Endocrinology

Geographic location within the United States appears to have an impact on the specific symptoms of polycystic ovary syndrome (PCOS) that any one particular woman will develop, according to a new prospective cohort study.

Women in California were more likely to exhibit high levels of testosterone (hyperandrogenism), while women in Alabama with PCOS had more metabolic dysfunction and hirsutism.

And although the women in Alabama were younger and had a higher body mass index (BMI), even after adjusting for these factors, the clinical differences were still present between the geographic locations, the authors said.

“This study suggests there are regional differences in hormonal and metabolic parameters in women with PCOS in California and Alabama, highlighting the impact of differing genetic and environmental modulators on PCOS development,” Katherine VanHise, MD, of Cedars-Sinai Medical Center, Los Angeles, and colleagues wrote in their article, published online in the Journal of Clinical Endocrinology and Metabolism.
 

Genetic and environmental factors play a role

Prior research has looked at variations in symptoms of PCOS across countries and identified differences in hirsutism and its prevalence, which is greater in Middle Eastern, Mediterranean, and Indian women, noted senior author Margareta D. Pisarska, MD.

And women of some other backgrounds “are at increased risk of developing metabolic syndrome and insulin resistance, including South Asian, African, and Hispanic women, so they are at a greater risk trajectory of developing manifestations later on in life that can ultimately lead to adverse outcomes in overall health,” Dr. Pisarska, director of the division of reproductive endocrinology and infertility in obstetrics and gynecology at Cedars-Sinai, told this news organization.

“We do see regional differences in the diagnosis of PCOS [in the United States] as well as the manifestations of PCOS including high andrenoemia, hirsutism, and metabolic parameters ... and we need to better understand it because, at least in the entire population, weight was not the entire factor contributing to these differences,” she explained.

“So there are definitely environmental factors and possibly genetic factors that we need to take into consideration as we try to study these women and try to help them decrease their risk of metabolic syndrome later in life,” she noted.
 

Differences not attributable to race either

PCOS is a common endocrine disorder affecting women and female adolescents worldwide. Diagnosis usually requires at least two of the following to be present: ovulatory dysfunction, hyperandrogenism, and/or polycystic ovarian morphology.

Because of the prior work that had identified differences in symptoms among women with PCOS in different countries, the investigators set out to determine if women of the same race would have distinct hormonal and metabolic traits of PCOS in two geographical locations in the United States, suggesting geo-epidemiologic contributors of the disease

They evaluated 889 women at the University of Alabama at Birmingham and 721 at Cedars-Sinai Medical Center. Participants in Birmingham were a mean age of 28 years, had a mean BMI of 33.1 kg/m2, a mean waist-to-hip ratio of 0.8, and a mean hirsute rate of 84.6%. Participants in California were a mean age of 29.5 years, had an average BMI of 30.1 kg/m2, a mean waist-to-hip ratio of 0.9, and a mean hirsute rate of 72.8%.

The study team gathered data on menstrual cycle history, metabolic and hormonal parameters, and demographic data for each participant. They assessed hirsutism based on modified Ferriman-Gallwey scores of four or more. Patients were classified as having hyperandrogenemia if they had elevated androgen values greater than the 95th percentile of all values or androgen values that exceeded laboratory reference ranges.

The findings showed that Alabama women with PCOS had elevated homeostatic model assessment for insulin resistance scores (adjusted beta coefficient, 3.6; P < .001) and were more likely to be hirsute (adjusted odds ratio, 1.8; P < .001) after adjustment for BMI and age than those in California.

In contrast, women with PCOS in California were more likely to have elevated free testosterone and total testosterone values than women in Alabama (both P < .001). These findings persisted after adjusting for age and BMI.

When stratified by White race, these findings were similar. Notably, BMI and waist-to-hip ratio did not vary between regions in Black women with PCOS, although variations in metabolic dysfunction and androgen profiles persisted.

“This study supports regional differences in hormonal and metabolic parameters in women with PCOS in the United States, highlighting the impact of the environment on PCOS phenotype. Individuals of the same race in different geographical locations of the United States may have differing genetic predispositions for developing diseases such as PCOS,” the researchers said.

“Ongoing research is needed to identify modifiable environmental risk factors for PCOS that may be race and ethnic specific to bring precision medicine to the management of PCOS,” they conclude.

This work was supported in part by grants from the National Institutes of Health and an endowment of the Helping Hand of Los Angeles. Dr. VanHise reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Geographic location within the United States appears to have an impact on the specific symptoms of polycystic ovary syndrome (PCOS) that any one particular woman will develop, according to a new prospective cohort study.

Women in California were more likely to exhibit high levels of testosterone (hyperandrogenism), while women in Alabama with PCOS had more metabolic dysfunction and hirsutism.

And although the women in Alabama were younger and had a higher body mass index (BMI), even after adjusting for these factors, the clinical differences were still present between the geographic locations, the authors said.

“This study suggests there are regional differences in hormonal and metabolic parameters in women with PCOS in California and Alabama, highlighting the impact of differing genetic and environmental modulators on PCOS development,” Katherine VanHise, MD, of Cedars-Sinai Medical Center, Los Angeles, and colleagues wrote in their article, published online in the Journal of Clinical Endocrinology and Metabolism.
 

Genetic and environmental factors play a role

Prior research has looked at variations in symptoms of PCOS across countries and identified differences in hirsutism and its prevalence, which is greater in Middle Eastern, Mediterranean, and Indian women, noted senior author Margareta D. Pisarska, MD.

And women of some other backgrounds “are at increased risk of developing metabolic syndrome and insulin resistance, including South Asian, African, and Hispanic women, so they are at a greater risk trajectory of developing manifestations later on in life that can ultimately lead to adverse outcomes in overall health,” Dr. Pisarska, director of the division of reproductive endocrinology and infertility in obstetrics and gynecology at Cedars-Sinai, told this news organization.

“We do see regional differences in the diagnosis of PCOS [in the United States] as well as the manifestations of PCOS including high andrenoemia, hirsutism, and metabolic parameters ... and we need to better understand it because, at least in the entire population, weight was not the entire factor contributing to these differences,” she explained.

“So there are definitely environmental factors and possibly genetic factors that we need to take into consideration as we try to study these women and try to help them decrease their risk of metabolic syndrome later in life,” she noted.
 

Differences not attributable to race either

PCOS is a common endocrine disorder affecting women and female adolescents worldwide. Diagnosis usually requires at least two of the following to be present: ovulatory dysfunction, hyperandrogenism, and/or polycystic ovarian morphology.

Because of the prior work that had identified differences in symptoms among women with PCOS in different countries, the investigators set out to determine if women of the same race would have distinct hormonal and metabolic traits of PCOS in two geographical locations in the United States, suggesting geo-epidemiologic contributors of the disease

They evaluated 889 women at the University of Alabama at Birmingham and 721 at Cedars-Sinai Medical Center. Participants in Birmingham were a mean age of 28 years, had a mean BMI of 33.1 kg/m2, a mean waist-to-hip ratio of 0.8, and a mean hirsute rate of 84.6%. Participants in California were a mean age of 29.5 years, had an average BMI of 30.1 kg/m2, a mean waist-to-hip ratio of 0.9, and a mean hirsute rate of 72.8%.

The study team gathered data on menstrual cycle history, metabolic and hormonal parameters, and demographic data for each participant. They assessed hirsutism based on modified Ferriman-Gallwey scores of four or more. Patients were classified as having hyperandrogenemia if they had elevated androgen values greater than the 95th percentile of all values or androgen values that exceeded laboratory reference ranges.

The findings showed that Alabama women with PCOS had elevated homeostatic model assessment for insulin resistance scores (adjusted beta coefficient, 3.6; P < .001) and were more likely to be hirsute (adjusted odds ratio, 1.8; P < .001) after adjustment for BMI and age than those in California.

In contrast, women with PCOS in California were more likely to have elevated free testosterone and total testosterone values than women in Alabama (both P < .001). These findings persisted after adjusting for age and BMI.

When stratified by White race, these findings were similar. Notably, BMI and waist-to-hip ratio did not vary between regions in Black women with PCOS, although variations in metabolic dysfunction and androgen profiles persisted.

“This study supports regional differences in hormonal and metabolic parameters in women with PCOS in the United States, highlighting the impact of the environment on PCOS phenotype. Individuals of the same race in different geographical locations of the United States may have differing genetic predispositions for developing diseases such as PCOS,” the researchers said.

“Ongoing research is needed to identify modifiable environmental risk factors for PCOS that may be race and ethnic specific to bring precision medicine to the management of PCOS,” they conclude.

This work was supported in part by grants from the National Institutes of Health and an endowment of the Helping Hand of Los Angeles. Dr. VanHise reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Geographic location within the United States appears to have an impact on the specific symptoms of polycystic ovary syndrome (PCOS) that any one particular woman will develop, according to a new prospective cohort study.

Women in California were more likely to exhibit high levels of testosterone (hyperandrogenism), while women in Alabama with PCOS had more metabolic dysfunction and hirsutism.

And although the women in Alabama were younger and had a higher body mass index (BMI), even after adjusting for these factors, the clinical differences were still present between the geographic locations, the authors said.

“This study suggests there are regional differences in hormonal and metabolic parameters in women with PCOS in California and Alabama, highlighting the impact of differing genetic and environmental modulators on PCOS development,” Katherine VanHise, MD, of Cedars-Sinai Medical Center, Los Angeles, and colleagues wrote in their article, published online in the Journal of Clinical Endocrinology and Metabolism.
 

Genetic and environmental factors play a role

Prior research has looked at variations in symptoms of PCOS across countries and identified differences in hirsutism and its prevalence, which is greater in Middle Eastern, Mediterranean, and Indian women, noted senior author Margareta D. Pisarska, MD.

And women of some other backgrounds “are at increased risk of developing metabolic syndrome and insulin resistance, including South Asian, African, and Hispanic women, so they are at a greater risk trajectory of developing manifestations later on in life that can ultimately lead to adverse outcomes in overall health,” Dr. Pisarska, director of the division of reproductive endocrinology and infertility in obstetrics and gynecology at Cedars-Sinai, told this news organization.

“We do see regional differences in the diagnosis of PCOS [in the United States] as well as the manifestations of PCOS including high andrenoemia, hirsutism, and metabolic parameters ... and we need to better understand it because, at least in the entire population, weight was not the entire factor contributing to these differences,” she explained.

“So there are definitely environmental factors and possibly genetic factors that we need to take into consideration as we try to study these women and try to help them decrease their risk of metabolic syndrome later in life,” she noted.
 

Differences not attributable to race either

PCOS is a common endocrine disorder affecting women and female adolescents worldwide. Diagnosis usually requires at least two of the following to be present: ovulatory dysfunction, hyperandrogenism, and/or polycystic ovarian morphology.

Because of the prior work that had identified differences in symptoms among women with PCOS in different countries, the investigators set out to determine if women of the same race would have distinct hormonal and metabolic traits of PCOS in two geographical locations in the United States, suggesting geo-epidemiologic contributors of the disease

They evaluated 889 women at the University of Alabama at Birmingham and 721 at Cedars-Sinai Medical Center. Participants in Birmingham were a mean age of 28 years, had a mean BMI of 33.1 kg/m2, a mean waist-to-hip ratio of 0.8, and a mean hirsute rate of 84.6%. Participants in California were a mean age of 29.5 years, had an average BMI of 30.1 kg/m2, a mean waist-to-hip ratio of 0.9, and a mean hirsute rate of 72.8%.

The study team gathered data on menstrual cycle history, metabolic and hormonal parameters, and demographic data for each participant. They assessed hirsutism based on modified Ferriman-Gallwey scores of four or more. Patients were classified as having hyperandrogenemia if they had elevated androgen values greater than the 95th percentile of all values or androgen values that exceeded laboratory reference ranges.

The findings showed that Alabama women with PCOS had elevated homeostatic model assessment for insulin resistance scores (adjusted beta coefficient, 3.6; P < .001) and were more likely to be hirsute (adjusted odds ratio, 1.8; P < .001) after adjustment for BMI and age than those in California.

In contrast, women with PCOS in California were more likely to have elevated free testosterone and total testosterone values than women in Alabama (both P < .001). These findings persisted after adjusting for age and BMI.

When stratified by White race, these findings were similar. Notably, BMI and waist-to-hip ratio did not vary between regions in Black women with PCOS, although variations in metabolic dysfunction and androgen profiles persisted.

“This study supports regional differences in hormonal and metabolic parameters in women with PCOS in the United States, highlighting the impact of the environment on PCOS phenotype. Individuals of the same race in different geographical locations of the United States may have differing genetic predispositions for developing diseases such as PCOS,” the researchers said.

“Ongoing research is needed to identify modifiable environmental risk factors for PCOS that may be race and ethnic specific to bring precision medicine to the management of PCOS,” they conclude.

This work was supported in part by grants from the National Institutes of Health and an endowment of the Helping Hand of Los Angeles. Dr. VanHise reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Cardiac biomarkers vary according to sex hormones in healthy transgender adults, just as in cisgender individuals, a new cross-sectional study suggests.

Previous research in the general population has shown that females have a lower 99th percentile upper reference limit for high-sensitivity cardiac troponin (hs-cTn) than males, whereas N-terminal prohormone brain natriuretic peptide (NT-proBNP) concentrations are higher in females than males across all ages after puberty.

“That trend is similar for people that have been on gender-affirming hormones, saying that sex hormones are playing a role in how cardiac turnover happens in a healthy state,” study author Dina M. Greene, PhD, University of Washington, Seattle, said in an interview.

Although the number of transgender people seeking gender-affirming care is increasing, studies are limited and largely retrospective cohorts, she noted. The scientific literature evaluating and defining cardiac biomarker concentrations is “currently absent.”

The American Heart Association’s recent scientific statement on the cardiovascular health of transgender and gender diverse (TGD) people says mounting evidence points to worse CV health in TGD people and that part of this excess risk is driven by significant psychosocial stressors across the lifespan. “In addition, the use of gender-affirming hormone therapy may be associated with cardiometabolic changes, but health research in this area remains limited and, at times, contradictory.”

For the present study, Dr. Greene and colleagues reached out to LGBTQ-oriented primary care and internal medicine clinics in Seattle and Iowa City to recruit 79 transgender men prescribed testosterone (mean age, 28.8 years) and 93 transgender women (mean age, 35.1 years) prescribed estradiol for at least 12 months. The mean duration of hormone therapy was 4.8 and 3.5 years, respectively.

The median estradiol concentration was 51 pg/mL in transgender men and 207 pg/mL in transgender women. Median testosterone concentrations were 4.6 ng/mL and 0.4 ng/mL, respectively.

The cardiac biomarkers were measured with the ARCHITECT STAT (Abbott Diagnostics) and ACCESS (Beckman Coulter) high-sensitivity troponin I assays, the Elecsys Troponin T Gen 5 STAT assay (Roche Diagnostics), and the Elecsys ProBNP II immunoassay (Roche Diagnostics).

As reported in JAMA Cardiology, the median hs-cTnI level on the ARCHITECT STAT assay was 0.9 ng/L (range, 0.6-1.7) in transgender men and 0.6 ng/L (range, 0.3-1.0) in transgender women. The pattern was consistent across the two other assays.

In contrast, the median NT-proBNP level was 17 ng/L (range, 13-27) in transgender men and 49 ng/L (range, 32-86) in transgender women.

“It seems that sex hormone concentration is a stronger driver of baseline cardiac troponin and NT-proBNP concentrations relative to sex assigned at birth,” Dr. Greene said.

The observed differences in hs-cTn concentrations “are likely physiological and not pathological,” given that concentrations between healthy cisgender people are also apparent and not thought to portend adverse events, the authors noted.

Teasing out the clinical implications of sex-specific hs-cTn upper reference limits for ruling in acute myocardial infarction (MI), however, is complicated by biological and social factors that contribute to poorer outcomes in women, despite lower baseline levels, they added. “Ultimately, the psychosocial benefits of gender-affirming hormones are substantial, and informed consent is likely the ideal method to balance the undetermined risks.”

Dr. Greene pointed out that the study wasn’t powered to accurately calculate gender-specific hs-cTn 99th percentiles or reference intervals for NT-proBNP and assessed the biomarkers at a single time point.

For the transgender person presenting with chest pain, she said, the clinical implications are not yet known, but the data suggest that when sex-specific 99th percentiles for hs-cTn are used, the numeric value associated with the affirmed gender, rather than the sex assigned at birth, may be the appropriate URL.

“It really depends on what the triage pathway is and if that pathway has differences for people of different sexes and how often people get serial measurements,” Dr. Greene said. “Within this population, it’s very important to look at those serial measurements because for people that are not cismen, those 99th percentiles when they’re non–sex specific, are going to favor in detection of a heart attack. So, you need to look at the second value to make sure there hasn’t been a change over time.”

The observed differences in the distribution of NT-proBNP concentrations is similar to that in the cisgender population, Dr. Greene noted. But these differences do not lead to sex-specific diagnostic thresholds because of the significant elevations present in overt heart failure and cardiovascular disease. “For NT-proBNP, it’s not as important. People don’t usually have a little bit of heart failure, they have heart failure, where people have small MIs.”

Dr. Greene said she would like to see larger trials looking at biomarker measurements and cardiac imaging before hormone therapy but that the biggest issue is the need for inclusion of transgender people in all cardiovascular trials.

“The sample sizes are never going to be as big as we get for cisgender people for a number of reasons but ensuring that it’s something that’s being asked on intake and monitored over time so we can understand how transgender people fit into the general population for cardiac disease,” Dr. Greene said. “And so, we can normalize that they exist. I keep driving this point home, but this is the biggest thing right now when it’s such a political issue.”

The study was supported in part by the department of laboratory medicine at the University of Washington, the department of pathology at the University of Iowa, and a grant from Abbott Diagnostics for in-kind high-sensitivity cardiac troponin I reagent. One coauthor reported financial relationships with Siemens Healthineers, Roche Diagnostics, Beckman Coulter, Becton, Dickinson, Abbott Diagnostics, Quidel Diagnostics, Sphingotech, and PixCell Medical. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

Cardiac biomarkers vary according to sex hormones in healthy transgender adults, just as in cisgender individuals, a new cross-sectional study suggests.

Previous research in the general population has shown that females have a lower 99th percentile upper reference limit for high-sensitivity cardiac troponin (hs-cTn) than males, whereas N-terminal prohormone brain natriuretic peptide (NT-proBNP) concentrations are higher in females than males across all ages after puberty.

“That trend is similar for people that have been on gender-affirming hormones, saying that sex hormones are playing a role in how cardiac turnover happens in a healthy state,” study author Dina M. Greene, PhD, University of Washington, Seattle, said in an interview.

Although the number of transgender people seeking gender-affirming care is increasing, studies are limited and largely retrospective cohorts, she noted. The scientific literature evaluating and defining cardiac biomarker concentrations is “currently absent.”

The American Heart Association’s recent scientific statement on the cardiovascular health of transgender and gender diverse (TGD) people says mounting evidence points to worse CV health in TGD people and that part of this excess risk is driven by significant psychosocial stressors across the lifespan. “In addition, the use of gender-affirming hormone therapy may be associated with cardiometabolic changes, but health research in this area remains limited and, at times, contradictory.”

For the present study, Dr. Greene and colleagues reached out to LGBTQ-oriented primary care and internal medicine clinics in Seattle and Iowa City to recruit 79 transgender men prescribed testosterone (mean age, 28.8 years) and 93 transgender women (mean age, 35.1 years) prescribed estradiol for at least 12 months. The mean duration of hormone therapy was 4.8 and 3.5 years, respectively.

The median estradiol concentration was 51 pg/mL in transgender men and 207 pg/mL in transgender women. Median testosterone concentrations were 4.6 ng/mL and 0.4 ng/mL, respectively.

The cardiac biomarkers were measured with the ARCHITECT STAT (Abbott Diagnostics) and ACCESS (Beckman Coulter) high-sensitivity troponin I assays, the Elecsys Troponin T Gen 5 STAT assay (Roche Diagnostics), and the Elecsys ProBNP II immunoassay (Roche Diagnostics).

As reported in JAMA Cardiology, the median hs-cTnI level on the ARCHITECT STAT assay was 0.9 ng/L (range, 0.6-1.7) in transgender men and 0.6 ng/L (range, 0.3-1.0) in transgender women. The pattern was consistent across the two other assays.

In contrast, the median NT-proBNP level was 17 ng/L (range, 13-27) in transgender men and 49 ng/L (range, 32-86) in transgender women.

“It seems that sex hormone concentration is a stronger driver of baseline cardiac troponin and NT-proBNP concentrations relative to sex assigned at birth,” Dr. Greene said.

The observed differences in hs-cTn concentrations “are likely physiological and not pathological,” given that concentrations between healthy cisgender people are also apparent and not thought to portend adverse events, the authors noted.

Teasing out the clinical implications of sex-specific hs-cTn upper reference limits for ruling in acute myocardial infarction (MI), however, is complicated by biological and social factors that contribute to poorer outcomes in women, despite lower baseline levels, they added. “Ultimately, the psychosocial benefits of gender-affirming hormones are substantial, and informed consent is likely the ideal method to balance the undetermined risks.”

Dr. Greene pointed out that the study wasn’t powered to accurately calculate gender-specific hs-cTn 99th percentiles or reference intervals for NT-proBNP and assessed the biomarkers at a single time point.

For the transgender person presenting with chest pain, she said, the clinical implications are not yet known, but the data suggest that when sex-specific 99th percentiles for hs-cTn are used, the numeric value associated with the affirmed gender, rather than the sex assigned at birth, may be the appropriate URL.

“It really depends on what the triage pathway is and if that pathway has differences for people of different sexes and how often people get serial measurements,” Dr. Greene said. “Within this population, it’s very important to look at those serial measurements because for people that are not cismen, those 99th percentiles when they’re non–sex specific, are going to favor in detection of a heart attack. So, you need to look at the second value to make sure there hasn’t been a change over time.”

The observed differences in the distribution of NT-proBNP concentrations is similar to that in the cisgender population, Dr. Greene noted. But these differences do not lead to sex-specific diagnostic thresholds because of the significant elevations present in overt heart failure and cardiovascular disease. “For NT-proBNP, it’s not as important. People don’t usually have a little bit of heart failure, they have heart failure, where people have small MIs.”

Dr. Greene said she would like to see larger trials looking at biomarker measurements and cardiac imaging before hormone therapy but that the biggest issue is the need for inclusion of transgender people in all cardiovascular trials.

“The sample sizes are never going to be as big as we get for cisgender people for a number of reasons but ensuring that it’s something that’s being asked on intake and monitored over time so we can understand how transgender people fit into the general population for cardiac disease,” Dr. Greene said. “And so, we can normalize that they exist. I keep driving this point home, but this is the biggest thing right now when it’s such a political issue.”

The study was supported in part by the department of laboratory medicine at the University of Washington, the department of pathology at the University of Iowa, and a grant from Abbott Diagnostics for in-kind high-sensitivity cardiac troponin I reagent. One coauthor reported financial relationships with Siemens Healthineers, Roche Diagnostics, Beckman Coulter, Becton, Dickinson, Abbott Diagnostics, Quidel Diagnostics, Sphingotech, and PixCell Medical. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

Cardiac biomarkers vary according to sex hormones in healthy transgender adults, just as in cisgender individuals, a new cross-sectional study suggests.

Previous research in the general population has shown that females have a lower 99th percentile upper reference limit for high-sensitivity cardiac troponin (hs-cTn) than males, whereas N-terminal prohormone brain natriuretic peptide (NT-proBNP) concentrations are higher in females than males across all ages after puberty.

“That trend is similar for people that have been on gender-affirming hormones, saying that sex hormones are playing a role in how cardiac turnover happens in a healthy state,” study author Dina M. Greene, PhD, University of Washington, Seattle, said in an interview.

Although the number of transgender people seeking gender-affirming care is increasing, studies are limited and largely retrospective cohorts, she noted. The scientific literature evaluating and defining cardiac biomarker concentrations is “currently absent.”

The American Heart Association’s recent scientific statement on the cardiovascular health of transgender and gender diverse (TGD) people says mounting evidence points to worse CV health in TGD people and that part of this excess risk is driven by significant psychosocial stressors across the lifespan. “In addition, the use of gender-affirming hormone therapy may be associated with cardiometabolic changes, but health research in this area remains limited and, at times, contradictory.”

For the present study, Dr. Greene and colleagues reached out to LGBTQ-oriented primary care and internal medicine clinics in Seattle and Iowa City to recruit 79 transgender men prescribed testosterone (mean age, 28.8 years) and 93 transgender women (mean age, 35.1 years) prescribed estradiol for at least 12 months. The mean duration of hormone therapy was 4.8 and 3.5 years, respectively.

The median estradiol concentration was 51 pg/mL in transgender men and 207 pg/mL in transgender women. Median testosterone concentrations were 4.6 ng/mL and 0.4 ng/mL, respectively.

The cardiac biomarkers were measured with the ARCHITECT STAT (Abbott Diagnostics) and ACCESS (Beckman Coulter) high-sensitivity troponin I assays, the Elecsys Troponin T Gen 5 STAT assay (Roche Diagnostics), and the Elecsys ProBNP II immunoassay (Roche Diagnostics).

As reported in JAMA Cardiology, the median hs-cTnI level on the ARCHITECT STAT assay was 0.9 ng/L (range, 0.6-1.7) in transgender men and 0.6 ng/L (range, 0.3-1.0) in transgender women. The pattern was consistent across the two other assays.

In contrast, the median NT-proBNP level was 17 ng/L (range, 13-27) in transgender men and 49 ng/L (range, 32-86) in transgender women.

“It seems that sex hormone concentration is a stronger driver of baseline cardiac troponin and NT-proBNP concentrations relative to sex assigned at birth,” Dr. Greene said.

The observed differences in hs-cTn concentrations “are likely physiological and not pathological,” given that concentrations between healthy cisgender people are also apparent and not thought to portend adverse events, the authors noted.

Teasing out the clinical implications of sex-specific hs-cTn upper reference limits for ruling in acute myocardial infarction (MI), however, is complicated by biological and social factors that contribute to poorer outcomes in women, despite lower baseline levels, they added. “Ultimately, the psychosocial benefits of gender-affirming hormones are substantial, and informed consent is likely the ideal method to balance the undetermined risks.”

Dr. Greene pointed out that the study wasn’t powered to accurately calculate gender-specific hs-cTn 99th percentiles or reference intervals for NT-proBNP and assessed the biomarkers at a single time point.

For the transgender person presenting with chest pain, she said, the clinical implications are not yet known, but the data suggest that when sex-specific 99th percentiles for hs-cTn are used, the numeric value associated with the affirmed gender, rather than the sex assigned at birth, may be the appropriate URL.

“It really depends on what the triage pathway is and if that pathway has differences for people of different sexes and how often people get serial measurements,” Dr. Greene said. “Within this population, it’s very important to look at those serial measurements because for people that are not cismen, those 99th percentiles when they’re non–sex specific, are going to favor in detection of a heart attack. So, you need to look at the second value to make sure there hasn’t been a change over time.”

The observed differences in the distribution of NT-proBNP concentrations is similar to that in the cisgender population, Dr. Greene noted. But these differences do not lead to sex-specific diagnostic thresholds because of the significant elevations present in overt heart failure and cardiovascular disease. “For NT-proBNP, it’s not as important. People don’t usually have a little bit of heart failure, they have heart failure, where people have small MIs.”

Dr. Greene said she would like to see larger trials looking at biomarker measurements and cardiac imaging before hormone therapy but that the biggest issue is the need for inclusion of transgender people in all cardiovascular trials.

“The sample sizes are never going to be as big as we get for cisgender people for a number of reasons but ensuring that it’s something that’s being asked on intake and monitored over time so we can understand how transgender people fit into the general population for cardiac disease,” Dr. Greene said. “And so, we can normalize that they exist. I keep driving this point home, but this is the biggest thing right now when it’s such a political issue.”

The study was supported in part by the department of laboratory medicine at the University of Washington, the department of pathology at the University of Iowa, and a grant from Abbott Diagnostics for in-kind high-sensitivity cardiac troponin I reagent. One coauthor reported financial relationships with Siemens Healthineers, Roche Diagnostics, Beckman Coulter, Becton, Dickinson, Abbott Diagnostics, Quidel Diagnostics, Sphingotech, and PixCell Medical. No other disclosures were reported.

A version of this article first appeared on Medscape.com.

Google the word “dopamine” and you will learn that its nicknames are the “happy hormone” and the “pleasure molecule” and that it is among the most important chemicals in our brains. With The Guardian branding it “the Kim Kardashian of neurotransmitters,” dopamine has become a true pop-science darling – people across the globe have attempted to boost their mood with dopamine fasts and dopamine dressing.

A century ago, however, newly discovered dopamine was seen as an uninspiring chemical, nothing more than a precursor of noradrenaline. It took several stubborn and hardworking scientists to change that view.
 

Levodopa: An indifferent precursor

When Casimir Funk, PhD, a Polish biochemist and the discoverer of vitamins, first synthesized the dopamine precursor levodopa in 1911, he had no idea how important the molecule would prove to be in pharmacology and neurobiology. Nor did Markus Guggenheim, PhD, a Swiss biochemist, who isolated levodopa in 1913 from the seeds of a broad bean, Vicia faba. Dr. Guggenheim administered 1 g of levodopa to a rabbit, with no apparent negative consequences. He then prepared a larger dose (2.5 g) and tested it on himself. “Ten minutes after taking it, I felt very nauseous, I had to vomit twice,” he wrote in his paper. In the body, levodopa is converted into dopamine, which may act as an emetic – an effect Dr. Guggenheim didn’t understand. He simply abandoned his human study, erroneously concluding, on the basis of his animal research, that levodopa is “pharmacologically fairly indifferent.”

Around the same time, several scientists across Europe successfully synthesized dopamine, but those discoveries were shelved without much fanfare. For the next 3 decades, dopamine and levodopa were pushed into academic obscurity. Just before World War II, a group of German scientists showed that levodopa is metabolized to dopamine in the body, while another German researcher, Hermann Blaschko, MD, discovered that dopamine is an intermediary in the synthesis of noradrenaline. Even these findings, however, were not immediately accepted.

The dopamine story picked up pace in the post-war years with the observation that the hormone was present in various tissues and body fluids, although nowhere as abundantly as in the central nervous system. Intrigued, Dr. Blaschko, who (after escaping Nazi Germany, changing his name to Hugh, and starting work at Oxford [England] University) hypothesized that dopamine couldn’t be an unremarkable precursor of noradrenaline – it had to have some physiologic functions of its own. He asked his postdoctoral fellow, Oheh Hornykiewicz, MD, to test a few ideas. Dr. Hornykiewicz soon confirmed that dopamine lowered blood pressure in guinea pigs, proving that dopamine indeed had physiologic activity that was independent of other catecholamines.
 

Reserpine and rabbit ears

While Dr. Blaschko and Dr. Hornykiewicz were puzzling over dopamine’s physiologic role in the body, across the ocean at the National Heart Institute in Maryland, pharmacologist Bernard Brodie, PhD and colleagues were laying the groundwork for the discovery of dopamine’s starring role in the brain.

Spoiler alert: Dr. Brodie’s work showed that a new psychiatric drug known as reserpine was capable of fully depleting the brain’s stores of serotonin and – of greatest significance, as it turned out – mimicking the neuromuscular symptoms typical of Parkinson’s disease. The connection to dopamine would be made by new lab colleague Arvid Carlsson, MD, PhD, who would go on to win a Nobel Prize.

Derived from Rauwolfia serpentina (a plant that for centuries has been used in India for the treatment of mental illness, insomnia, and snake bites), reserpine was introduced in the West as a treatment for schizophrenia.

It worked marvels. In 1954, the press lauded the “dramatic” and seemingly “incredible”: results in treating “hopelessly insane patients.” Reserpine had a downside, however. Reports soon changed in tone regarding the drug’s severe side effects, including headaches, dizziness, vomiting, and, far more disturbingly, symptoms mimicking Parkinson’s disease, from muscular rigidity to tremors.

Dr. Brodie observed that, when reserpine was injected, animals became completely immobile. Serotonin nearly vanished from their brains, but bizarrely, drugs that spur serotonin production did not reverse the rabbits’ immobility.

Dr. Carlsson realized that other catecholamines must be involved in reserpine’s side effects, and he began to search for the culprits. He moved back to his native Sweden and ordered a spectrophotofluorimeter. In one of his experiments, Carlsson injected a pair of rabbits with reserpine, which caused the animals to become catatonic with flattened ears. After the researchers injected the animals with levodopa, within 15 minutes, the rabbits were hopping around, ears proudly vertical. “We were just as excited as the rabbits,” Dr. Carlsson later recalled in a 2016 interview. Dr. Carlsson realized that, because there was no noradrenaline in the rabbits’ brains, dopamine depletion must have been directly responsible for producing reserpine’s motor inhibitory effects.
 

Skeptics are silenced

In 1960, however, the medical community was not yet ready to accept that dopamine was anything but a boring intermediate between levodopa and noradrenaline. At a prestigious London symposium, Dr. Carlsson and his two colleagues presented their hypothesis that dopamine may be a neurotransmitter, thus implicating it in Parkinson’s disease. They were met with harsh criticism. Some of the experts said levodopa was nothing more than a poison. Dr. Carlsson later recalled facing “a profound and nearly unanimous skepticism regarding our points of view.”

That would soon change. Dr. Hornykiewicz, the biochemist who had earlier discovered dopamine’s BP-lowering effects, tested Dr. Carlsson’s ideas using the postmortem brains of Parkinson’s disease patients. It appeared Dr. Carlsson was right: Unlike in healthy brains, the striatum of patients with Parkinson’s disease contained almost no dopamine whatsoever. Beginning in 1961, in collaboration with neurologist Walther Birkmayer, MD, Hornykiewicz injected levodopa into 20 patients with Parkinson’s disease and observed a “miraculous” (albeit temporary) amelioration of rigidity, motionlessness, and speechlessness.

By the late 1960s, levodopa and dopamine were making headlines. A 1969 New York Times article described similar stunning improvements in patients with Parkinson’s disease who were treated with levodopa. A patient who had arrived at a hospital unable to speak, with hands clenched and rigid expression, was suddenly able to stride into his doctor’s office and even jog around. “I might say I’m a human being,” he told reporters. Although the treatment was expensive – equivalent to $210 in 2022 – physicians were deluged with requests for “dopa.” To this day, levodopa remains a gold standard in the treatment of Parkinson’s disease.
 

Still misunderstood

The history of dopamine, however, is not only about Parkinson’s disease but extends to the treatment of schizophrenia and addiction. When in the1940s a French military surgeon started giving a new antihistamine drug, promethazine, to prevent shock in soldiers undergoing surgery, he noticed a bizarre side effect: the soldiers would become euphoric yet oddly calm at the same time.

After the drug was modified by adding a chlorine atom and renamed chlorpromazine, it fast became a go-to treatment for psychosis. At the time, no one made the connection to dopamine. Contemporary doctors believed that it calmed people by lowering body temperature (common treatments for mental illness back in the day included swaddling patients in cold, wet sheets). Yet just like reserpine, chlorpromazine produced range of nasty side effects that closely mimicked Parkinson’s disease. This led a Dutch pharmacologist, Jacques van Rossum, to hypothesize that dopamine receptor blockade could explain chlorpromazine’s antipsychotic effects – an idea that remains widely accepted today.

In the 1970s, dopamine was linked with addiction through research on rodents, and this novel idea caught people’s imagination over the coming decades. A story on dopamine titled, “How We Get Addicted,” made the cover of Time in 1997.

Yet as the dopamine/addiction connection became widespread, it also became oversimplified. According to a 2015 article in Nature Reviews Neuroscience, a wave of low-quality research followed – nonreplicated, insufficient – which led the authors to conclude that we are “addicted to the dopamine theory of addiction.” Just about every pleasure under the sun was being attributed to dopamine, from eating delicious foods and playing computer games to sex, music, and hot showers. As recent science shows, however, dopamine is not simply about pleasure – it’s about reward prediction, response to stress, memory, learning, and even the functioning of the immune system. Since its first synthesis in the early 20th century, dopamine has often been misunderstood and oversimplified – and it seems the story is repeating itself now.

In one of his final interviews, Dr. Carlsson, who passed away in 2018 at the age of 95, warned about playing around with dopamine and, in particular, prescribing drugs that have an inhibitory action on this neurotransmitter. “Dopamine is involved in everything that happens in our brains – all its important functions,” he said.

We should be careful how we handle such a delicate and still little-known system.

A version of this article first appeared on Medscape.com.

Google the word “dopamine” and you will learn that its nicknames are the “happy hormone” and the “pleasure molecule” and that it is among the most important chemicals in our brains. With The Guardian branding it “the Kim Kardashian of neurotransmitters,” dopamine has become a true pop-science darling – people across the globe have attempted to boost their mood with dopamine fasts and dopamine dressing.

A century ago, however, newly discovered dopamine was seen as an uninspiring chemical, nothing more than a precursor of noradrenaline. It took several stubborn and hardworking scientists to change that view.
 

Levodopa: An indifferent precursor

When Casimir Funk, PhD, a Polish biochemist and the discoverer of vitamins, first synthesized the dopamine precursor levodopa in 1911, he had no idea how important the molecule would prove to be in pharmacology and neurobiology. Nor did Markus Guggenheim, PhD, a Swiss biochemist, who isolated levodopa in 1913 from the seeds of a broad bean, Vicia faba. Dr. Guggenheim administered 1 g of levodopa to a rabbit, with no apparent negative consequences. He then prepared a larger dose (2.5 g) and tested it on himself. “Ten minutes after taking it, I felt very nauseous, I had to vomit twice,” he wrote in his paper. In the body, levodopa is converted into dopamine, which may act as an emetic – an effect Dr. Guggenheim didn’t understand. He simply abandoned his human study, erroneously concluding, on the basis of his animal research, that levodopa is “pharmacologically fairly indifferent.”

Around the same time, several scientists across Europe successfully synthesized dopamine, but those discoveries were shelved without much fanfare. For the next 3 decades, dopamine and levodopa were pushed into academic obscurity. Just before World War II, a group of German scientists showed that levodopa is metabolized to dopamine in the body, while another German researcher, Hermann Blaschko, MD, discovered that dopamine is an intermediary in the synthesis of noradrenaline. Even these findings, however, were not immediately accepted.

The dopamine story picked up pace in the post-war years with the observation that the hormone was present in various tissues and body fluids, although nowhere as abundantly as in the central nervous system. Intrigued, Dr. Blaschko, who (after escaping Nazi Germany, changing his name to Hugh, and starting work at Oxford [England] University) hypothesized that dopamine couldn’t be an unremarkable precursor of noradrenaline – it had to have some physiologic functions of its own. He asked his postdoctoral fellow, Oheh Hornykiewicz, MD, to test a few ideas. Dr. Hornykiewicz soon confirmed that dopamine lowered blood pressure in guinea pigs, proving that dopamine indeed had physiologic activity that was independent of other catecholamines.
 

Reserpine and rabbit ears

While Dr. Blaschko and Dr. Hornykiewicz were puzzling over dopamine’s physiologic role in the body, across the ocean at the National Heart Institute in Maryland, pharmacologist Bernard Brodie, PhD and colleagues were laying the groundwork for the discovery of dopamine’s starring role in the brain.

Spoiler alert: Dr. Brodie’s work showed that a new psychiatric drug known as reserpine was capable of fully depleting the brain’s stores of serotonin and – of greatest significance, as it turned out – mimicking the neuromuscular symptoms typical of Parkinson’s disease. The connection to dopamine would be made by new lab colleague Arvid Carlsson, MD, PhD, who would go on to win a Nobel Prize.

Derived from Rauwolfia serpentina (a plant that for centuries has been used in India for the treatment of mental illness, insomnia, and snake bites), reserpine was introduced in the West as a treatment for schizophrenia.

It worked marvels. In 1954, the press lauded the “dramatic” and seemingly “incredible”: results in treating “hopelessly insane patients.” Reserpine had a downside, however. Reports soon changed in tone regarding the drug’s severe side effects, including headaches, dizziness, vomiting, and, far more disturbingly, symptoms mimicking Parkinson’s disease, from muscular rigidity to tremors.

Dr. Brodie observed that, when reserpine was injected, animals became completely immobile. Serotonin nearly vanished from their brains, but bizarrely, drugs that spur serotonin production did not reverse the rabbits’ immobility.

Dr. Carlsson realized that other catecholamines must be involved in reserpine’s side effects, and he began to search for the culprits. He moved back to his native Sweden and ordered a spectrophotofluorimeter. In one of his experiments, Carlsson injected a pair of rabbits with reserpine, which caused the animals to become catatonic with flattened ears. After the researchers injected the animals with levodopa, within 15 minutes, the rabbits were hopping around, ears proudly vertical. “We were just as excited as the rabbits,” Dr. Carlsson later recalled in a 2016 interview. Dr. Carlsson realized that, because there was no noradrenaline in the rabbits’ brains, dopamine depletion must have been directly responsible for producing reserpine’s motor inhibitory effects.
 

Skeptics are silenced

In 1960, however, the medical community was not yet ready to accept that dopamine was anything but a boring intermediate between levodopa and noradrenaline. At a prestigious London symposium, Dr. Carlsson and his two colleagues presented their hypothesis that dopamine may be a neurotransmitter, thus implicating it in Parkinson’s disease. They were met with harsh criticism. Some of the experts said levodopa was nothing more than a poison. Dr. Carlsson later recalled facing “a profound and nearly unanimous skepticism regarding our points of view.”

That would soon change. Dr. Hornykiewicz, the biochemist who had earlier discovered dopamine’s BP-lowering effects, tested Dr. Carlsson’s ideas using the postmortem brains of Parkinson’s disease patients. It appeared Dr. Carlsson was right: Unlike in healthy brains, the striatum of patients with Parkinson’s disease contained almost no dopamine whatsoever. Beginning in 1961, in collaboration with neurologist Walther Birkmayer, MD, Hornykiewicz injected levodopa into 20 patients with Parkinson’s disease and observed a “miraculous” (albeit temporary) amelioration of rigidity, motionlessness, and speechlessness.

By the late 1960s, levodopa and dopamine were making headlines. A 1969 New York Times article described similar stunning improvements in patients with Parkinson’s disease who were treated with levodopa. A patient who had arrived at a hospital unable to speak, with hands clenched and rigid expression, was suddenly able to stride into his doctor’s office and even jog around. “I might say I’m a human being,” he told reporters. Although the treatment was expensive – equivalent to $210 in 2022 – physicians were deluged with requests for “dopa.” To this day, levodopa remains a gold standard in the treatment of Parkinson’s disease.
 

Still misunderstood

The history of dopamine, however, is not only about Parkinson’s disease but extends to the treatment of schizophrenia and addiction. When in the1940s a French military surgeon started giving a new antihistamine drug, promethazine, to prevent shock in soldiers undergoing surgery, he noticed a bizarre side effect: the soldiers would become euphoric yet oddly calm at the same time.

After the drug was modified by adding a chlorine atom and renamed chlorpromazine, it fast became a go-to treatment for psychosis. At the time, no one made the connection to dopamine. Contemporary doctors believed that it calmed people by lowering body temperature (common treatments for mental illness back in the day included swaddling patients in cold, wet sheets). Yet just like reserpine, chlorpromazine produced range of nasty side effects that closely mimicked Parkinson’s disease. This led a Dutch pharmacologist, Jacques van Rossum, to hypothesize that dopamine receptor blockade could explain chlorpromazine’s antipsychotic effects – an idea that remains widely accepted today.

In the 1970s, dopamine was linked with addiction through research on rodents, and this novel idea caught people’s imagination over the coming decades. A story on dopamine titled, “How We Get Addicted,” made the cover of Time in 1997.

Yet as the dopamine/addiction connection became widespread, it also became oversimplified. According to a 2015 article in Nature Reviews Neuroscience, a wave of low-quality research followed – nonreplicated, insufficient – which led the authors to conclude that we are “addicted to the dopamine theory of addiction.” Just about every pleasure under the sun was being attributed to dopamine, from eating delicious foods and playing computer games to sex, music, and hot showers. As recent science shows, however, dopamine is not simply about pleasure – it’s about reward prediction, response to stress, memory, learning, and even the functioning of the immune system. Since its first synthesis in the early 20th century, dopamine has often been misunderstood and oversimplified – and it seems the story is repeating itself now.

In one of his final interviews, Dr. Carlsson, who passed away in 2018 at the age of 95, warned about playing around with dopamine and, in particular, prescribing drugs that have an inhibitory action on this neurotransmitter. “Dopamine is involved in everything that happens in our brains – all its important functions,” he said.

We should be careful how we handle such a delicate and still little-known system.

A version of this article first appeared on Medscape.com.

Google the word “dopamine” and you will learn that its nicknames are the “happy hormone” and the “pleasure molecule” and that it is among the most important chemicals in our brains. With The Guardian branding it “the Kim Kardashian of neurotransmitters,” dopamine has become a true pop-science darling – people across the globe have attempted to boost their mood with dopamine fasts and dopamine dressing.

A century ago, however, newly discovered dopamine was seen as an uninspiring chemical, nothing more than a precursor of noradrenaline. It took several stubborn and hardworking scientists to change that view.
 

Levodopa: An indifferent precursor

When Casimir Funk, PhD, a Polish biochemist and the discoverer of vitamins, first synthesized the dopamine precursor levodopa in 1911, he had no idea how important the molecule would prove to be in pharmacology and neurobiology. Nor did Markus Guggenheim, PhD, a Swiss biochemist, who isolated levodopa in 1913 from the seeds of a broad bean, Vicia faba. Dr. Guggenheim administered 1 g of levodopa to a rabbit, with no apparent negative consequences. He then prepared a larger dose (2.5 g) and tested it on himself. “Ten minutes after taking it, I felt very nauseous, I had to vomit twice,” he wrote in his paper. In the body, levodopa is converted into dopamine, which may act as an emetic – an effect Dr. Guggenheim didn’t understand. He simply abandoned his human study, erroneously concluding, on the basis of his animal research, that levodopa is “pharmacologically fairly indifferent.”

Around the same time, several scientists across Europe successfully synthesized dopamine, but those discoveries were shelved without much fanfare. For the next 3 decades, dopamine and levodopa were pushed into academic obscurity. Just before World War II, a group of German scientists showed that levodopa is metabolized to dopamine in the body, while another German researcher, Hermann Blaschko, MD, discovered that dopamine is an intermediary in the synthesis of noradrenaline. Even these findings, however, were not immediately accepted.

The dopamine story picked up pace in the post-war years with the observation that the hormone was present in various tissues and body fluids, although nowhere as abundantly as in the central nervous system. Intrigued, Dr. Blaschko, who (after escaping Nazi Germany, changing his name to Hugh, and starting work at Oxford [England] University) hypothesized that dopamine couldn’t be an unremarkable precursor of noradrenaline – it had to have some physiologic functions of its own. He asked his postdoctoral fellow, Oheh Hornykiewicz, MD, to test a few ideas. Dr. Hornykiewicz soon confirmed that dopamine lowered blood pressure in guinea pigs, proving that dopamine indeed had physiologic activity that was independent of other catecholamines.
 

Reserpine and rabbit ears

While Dr. Blaschko and Dr. Hornykiewicz were puzzling over dopamine’s physiologic role in the body, across the ocean at the National Heart Institute in Maryland, pharmacologist Bernard Brodie, PhD and colleagues were laying the groundwork for the discovery of dopamine’s starring role in the brain.

Spoiler alert: Dr. Brodie’s work showed that a new psychiatric drug known as reserpine was capable of fully depleting the brain’s stores of serotonin and – of greatest significance, as it turned out – mimicking the neuromuscular symptoms typical of Parkinson’s disease. The connection to dopamine would be made by new lab colleague Arvid Carlsson, MD, PhD, who would go on to win a Nobel Prize.

Derived from Rauwolfia serpentina (a plant that for centuries has been used in India for the treatment of mental illness, insomnia, and snake bites), reserpine was introduced in the West as a treatment for schizophrenia.

It worked marvels. In 1954, the press lauded the “dramatic” and seemingly “incredible”: results in treating “hopelessly insane patients.” Reserpine had a downside, however. Reports soon changed in tone regarding the drug’s severe side effects, including headaches, dizziness, vomiting, and, far more disturbingly, symptoms mimicking Parkinson’s disease, from muscular rigidity to tremors.

Dr. Brodie observed that, when reserpine was injected, animals became completely immobile. Serotonin nearly vanished from their brains, but bizarrely, drugs that spur serotonin production did not reverse the rabbits’ immobility.

Dr. Carlsson realized that other catecholamines must be involved in reserpine’s side effects, and he began to search for the culprits. He moved back to his native Sweden and ordered a spectrophotofluorimeter. In one of his experiments, Carlsson injected a pair of rabbits with reserpine, which caused the animals to become catatonic with flattened ears. After the researchers injected the animals with levodopa, within 15 minutes, the rabbits were hopping around, ears proudly vertical. “We were just as excited as the rabbits,” Dr. Carlsson later recalled in a 2016 interview. Dr. Carlsson realized that, because there was no noradrenaline in the rabbits’ brains, dopamine depletion must have been directly responsible for producing reserpine’s motor inhibitory effects.
 

Skeptics are silenced

In 1960, however, the medical community was not yet ready to accept that dopamine was anything but a boring intermediate between levodopa and noradrenaline. At a prestigious London symposium, Dr. Carlsson and his two colleagues presented their hypothesis that dopamine may be a neurotransmitter, thus implicating it in Parkinson’s disease. They were met with harsh criticism. Some of the experts said levodopa was nothing more than a poison. Dr. Carlsson later recalled facing “a profound and nearly unanimous skepticism regarding our points of view.”

That would soon change. Dr. Hornykiewicz, the biochemist who had earlier discovered dopamine’s BP-lowering effects, tested Dr. Carlsson’s ideas using the postmortem brains of Parkinson’s disease patients. It appeared Dr. Carlsson was right: Unlike in healthy brains, the striatum of patients with Parkinson’s disease contained almost no dopamine whatsoever. Beginning in 1961, in collaboration with neurologist Walther Birkmayer, MD, Hornykiewicz injected levodopa into 20 patients with Parkinson’s disease and observed a “miraculous” (albeit temporary) amelioration of rigidity, motionlessness, and speechlessness.

By the late 1960s, levodopa and dopamine were making headlines. A 1969 New York Times article described similar stunning improvements in patients with Parkinson’s disease who were treated with levodopa. A patient who had arrived at a hospital unable to speak, with hands clenched and rigid expression, was suddenly able to stride into his doctor’s office and even jog around. “I might say I’m a human being,” he told reporters. Although the treatment was expensive – equivalent to $210 in 2022 – physicians were deluged with requests for “dopa.” To this day, levodopa remains a gold standard in the treatment of Parkinson’s disease.
 

Still misunderstood

The history of dopamine, however, is not only about Parkinson’s disease but extends to the treatment of schizophrenia and addiction. When in the1940s a French military surgeon started giving a new antihistamine drug, promethazine, to prevent shock in soldiers undergoing surgery, he noticed a bizarre side effect: the soldiers would become euphoric yet oddly calm at the same time.

After the drug was modified by adding a chlorine atom and renamed chlorpromazine, it fast became a go-to treatment for psychosis. At the time, no one made the connection to dopamine. Contemporary doctors believed that it calmed people by lowering body temperature (common treatments for mental illness back in the day included swaddling patients in cold, wet sheets). Yet just like reserpine, chlorpromazine produced range of nasty side effects that closely mimicked Parkinson’s disease. This led a Dutch pharmacologist, Jacques van Rossum, to hypothesize that dopamine receptor blockade could explain chlorpromazine’s antipsychotic effects – an idea that remains widely accepted today.

In the 1970s, dopamine was linked with addiction through research on rodents, and this novel idea caught people’s imagination over the coming decades. A story on dopamine titled, “How We Get Addicted,” made the cover of Time in 1997.

Yet as the dopamine/addiction connection became widespread, it also became oversimplified. According to a 2015 article in Nature Reviews Neuroscience, a wave of low-quality research followed – nonreplicated, insufficient – which led the authors to conclude that we are “addicted to the dopamine theory of addiction.” Just about every pleasure under the sun was being attributed to dopamine, from eating delicious foods and playing computer games to sex, music, and hot showers. As recent science shows, however, dopamine is not simply about pleasure – it’s about reward prediction, response to stress, memory, learning, and even the functioning of the immune system. Since its first synthesis in the early 20th century, dopamine has often been misunderstood and oversimplified – and it seems the story is repeating itself now.

In one of his final interviews, Dr. Carlsson, who passed away in 2018 at the age of 95, warned about playing around with dopamine and, in particular, prescribing drugs that have an inhibitory action on this neurotransmitter. “Dopamine is involved in everything that happens in our brains – all its important functions,” he said.

We should be careful how we handle such a delicate and still little-known system.

A version of this article first appeared on Medscape.com.

STOCKHOLM – The number of people living with type 1 diabetes worldwide is expected to double by 2040, with most new cases among adults living in low- and middle-income countries, new modeling data suggest.

The forecast, developed from available data collected in the newly established open-source Type 1 Diabetes Index, provides estimates for type 1 diabetes prevalence, incidence, associated mortality, and life expectancy for 201 countries for 2021.

The model also projects estimates for prevalent cases in 2040. It is the first type 1 diabetes dataset to account for the lack of prevalence because of premature mortality, particularly in low- and middle-income countries.

“The worldwide prevalence of type 1 diabetes is substantial and growing. Improved surveillance – particularly in adults who make up most of the population living with type 1 diabetes – is essential to enable improvements to care and outcomes. There is an opportunity to save millions of lives in the coming decades by raising the standard of care (including ensuring universal access to insulin and other essential supplies) and increasing awareness of the signs and symptoms of type 1 diabetes to enable a 100% rate of diagnosis in all countries,” the authors write.

“This work spells out the need for early diagnosis of type 1 diabetes and timely access to quality care,” said Chantal Mathieu, MD, at the European Association for the Study of Diabetes annual meeting.
 

One in five deaths from type 1 diabetes in under 25s

The new findings were published in Lancet Diabetes & Endocrinology by Gabriel A. Gregory, MD, of Life for a Child Program, New South Wales, Australia, and colleagues. The T1D Index Project database was published Sept. 21, 2022.

According to the model, about 8.4 million people were living with type 1 diabetes in 2021, with one-fifth from low- and middle-income countries. An additional 3.7 million died prematurely and would have been added to that count had they lived. One in five of all deaths caused by type 1 diabetes in 2021 is estimated to have occurred in people younger than age 25 years because of nondiagnosis.

“It is unacceptable that, in 2022, some 35,000 people worldwide are dying undiagnosed within a year of onset of symptoms. There also continues to be a huge disparity in life expectancy for people with type 1 diabetes, hitting those in the poorest countries hardest,” noted Dr. Mathieu, who is senior vice-president of EASD and an endocrinologist based at KU Leuven, Belgium.

By 2040, the model predicts that between 13.5 million and 17.4 million people will be living with the condition, with the largest relative increase from 2021 in low-income and lower-middle-income countries. The majority of incident and prevalent cases of type 1 diabetes are in adults, with an estimated 62% of 510,000 new diagnoses worldwide in 2021 occurring in people aged 20 years and older.
 

Type 1 diabetes is not predominantly a disease of childhood

Dr. Mathieu also noted that the data dispute the long-held view of type 1 diabetes as a predominantly pediatric condition. Indeed, worldwide, the median age for a person living with type 1 diabetes is 37 years.

“While type 1 diabetes is often referred to as ‘child-onset’ diabetes, this important study shows that only around one in five living with the condition are aged 20 years or younger, two-thirds are aged 20-64 years, and a further one in five are aged 65 years or older.”

“This condition does not stop at age 18 years – the children become adults, and the adults become elderly. All countries must examine and strengthen their diagnosis and care pathways for people of all ages living with type 1 diabetes,” Dr. Mathieu emphasized.

And in an accompanying editorial, Serena Jingchuan Guo, MD, PhD, and Hui Shao, MD, PhD, point out that most studies that estimate diabetes burden have focused on type 2 diabetes, noting, “type 1 diabetes faces the challenges of misdiagnosis, underdiagnosis, high risk of complications, and premature mortality.”

The insulin affordability issue is central, point out Dr. Guo and Dr. Shao of the Center for Drug Evaluation and Safety, department of pharmaceutical evaluation and policy, University of Florida College of Pharmacy, Gainesville.

“Countries need to strengthen the price regulation and reimbursement policy for insulin while building subsidy programs to ensure insulin access and to cope with the growing demand for insulin. Meanwhile, optimizing the insulin supply chain between manufacturers and patients while seeking alternative treatment options (for example, biosimilar products) will also improve the current situation,” they conclude.   

The study was funded by JDRF, of which four coauthors are employees. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

STOCKHOLM – The number of people living with type 1 diabetes worldwide is expected to double by 2040, with most new cases among adults living in low- and middle-income countries, new modeling data suggest.

The forecast, developed from available data collected in the newly established open-source Type 1 Diabetes Index, provides estimates for type 1 diabetes prevalence, incidence, associated mortality, and life expectancy for 201 countries for 2021.

The model also projects estimates for prevalent cases in 2040. It is the first type 1 diabetes dataset to account for the lack of prevalence because of premature mortality, particularly in low- and middle-income countries.

“The worldwide prevalence of type 1 diabetes is substantial and growing. Improved surveillance – particularly in adults who make up most of the population living with type 1 diabetes – is essential to enable improvements to care and outcomes. There is an opportunity to save millions of lives in the coming decades by raising the standard of care (including ensuring universal access to insulin and other essential supplies) and increasing awareness of the signs and symptoms of type 1 diabetes to enable a 100% rate of diagnosis in all countries,” the authors write.

“This work spells out the need for early diagnosis of type 1 diabetes and timely access to quality care,” said Chantal Mathieu, MD, at the European Association for the Study of Diabetes annual meeting.
 

One in five deaths from type 1 diabetes in under 25s

The new findings were published in Lancet Diabetes & Endocrinology by Gabriel A. Gregory, MD, of Life for a Child Program, New South Wales, Australia, and colleagues. The T1D Index Project database was published Sept. 21, 2022.

According to the model, about 8.4 million people were living with type 1 diabetes in 2021, with one-fifth from low- and middle-income countries. An additional 3.7 million died prematurely and would have been added to that count had they lived. One in five of all deaths caused by type 1 diabetes in 2021 is estimated to have occurred in people younger than age 25 years because of nondiagnosis.

“It is unacceptable that, in 2022, some 35,000 people worldwide are dying undiagnosed within a year of onset of symptoms. There also continues to be a huge disparity in life expectancy for people with type 1 diabetes, hitting those in the poorest countries hardest,” noted Dr. Mathieu, who is senior vice-president of EASD and an endocrinologist based at KU Leuven, Belgium.

By 2040, the model predicts that between 13.5 million and 17.4 million people will be living with the condition, with the largest relative increase from 2021 in low-income and lower-middle-income countries. The majority of incident and prevalent cases of type 1 diabetes are in adults, with an estimated 62% of 510,000 new diagnoses worldwide in 2021 occurring in people aged 20 years and older.
 

Type 1 diabetes is not predominantly a disease of childhood

Dr. Mathieu also noted that the data dispute the long-held view of type 1 diabetes as a predominantly pediatric condition. Indeed, worldwide, the median age for a person living with type 1 diabetes is 37 years.

“While type 1 diabetes is often referred to as ‘child-onset’ diabetes, this important study shows that only around one in five living with the condition are aged 20 years or younger, two-thirds are aged 20-64 years, and a further one in five are aged 65 years or older.”

“This condition does not stop at age 18 years – the children become adults, and the adults become elderly. All countries must examine and strengthen their diagnosis and care pathways for people of all ages living with type 1 diabetes,” Dr. Mathieu emphasized.

And in an accompanying editorial, Serena Jingchuan Guo, MD, PhD, and Hui Shao, MD, PhD, point out that most studies that estimate diabetes burden have focused on type 2 diabetes, noting, “type 1 diabetes faces the challenges of misdiagnosis, underdiagnosis, high risk of complications, and premature mortality.”

The insulin affordability issue is central, point out Dr. Guo and Dr. Shao of the Center for Drug Evaluation and Safety, department of pharmaceutical evaluation and policy, University of Florida College of Pharmacy, Gainesville.

“Countries need to strengthen the price regulation and reimbursement policy for insulin while building subsidy programs to ensure insulin access and to cope with the growing demand for insulin. Meanwhile, optimizing the insulin supply chain between manufacturers and patients while seeking alternative treatment options (for example, biosimilar products) will also improve the current situation,” they conclude.   

The study was funded by JDRF, of which four coauthors are employees. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

STOCKHOLM – The number of people living with type 1 diabetes worldwide is expected to double by 2040, with most new cases among adults living in low- and middle-income countries, new modeling data suggest.

The forecast, developed from available data collected in the newly established open-source Type 1 Diabetes Index, provides estimates for type 1 diabetes prevalence, incidence, associated mortality, and life expectancy for 201 countries for 2021.

The model also projects estimates for prevalent cases in 2040. It is the first type 1 diabetes dataset to account for the lack of prevalence because of premature mortality, particularly in low- and middle-income countries.

“The worldwide prevalence of type 1 diabetes is substantial and growing. Improved surveillance – particularly in adults who make up most of the population living with type 1 diabetes – is essential to enable improvements to care and outcomes. There is an opportunity to save millions of lives in the coming decades by raising the standard of care (including ensuring universal access to insulin and other essential supplies) and increasing awareness of the signs and symptoms of type 1 diabetes to enable a 100% rate of diagnosis in all countries,” the authors write.

“This work spells out the need for early diagnosis of type 1 diabetes and timely access to quality care,” said Chantal Mathieu, MD, at the European Association for the Study of Diabetes annual meeting.
 

One in five deaths from type 1 diabetes in under 25s

The new findings were published in Lancet Diabetes & Endocrinology by Gabriel A. Gregory, MD, of Life for a Child Program, New South Wales, Australia, and colleagues. The T1D Index Project database was published Sept. 21, 2022.

According to the model, about 8.4 million people were living with type 1 diabetes in 2021, with one-fifth from low- and middle-income countries. An additional 3.7 million died prematurely and would have been added to that count had they lived. One in five of all deaths caused by type 1 diabetes in 2021 is estimated to have occurred in people younger than age 25 years because of nondiagnosis.

“It is unacceptable that, in 2022, some 35,000 people worldwide are dying undiagnosed within a year of onset of symptoms. There also continues to be a huge disparity in life expectancy for people with type 1 diabetes, hitting those in the poorest countries hardest,” noted Dr. Mathieu, who is senior vice-president of EASD and an endocrinologist based at KU Leuven, Belgium.

By 2040, the model predicts that between 13.5 million and 17.4 million people will be living with the condition, with the largest relative increase from 2021 in low-income and lower-middle-income countries. The majority of incident and prevalent cases of type 1 diabetes are in adults, with an estimated 62% of 510,000 new diagnoses worldwide in 2021 occurring in people aged 20 years and older.
 

Type 1 diabetes is not predominantly a disease of childhood

Dr. Mathieu also noted that the data dispute the long-held view of type 1 diabetes as a predominantly pediatric condition. Indeed, worldwide, the median age for a person living with type 1 diabetes is 37 years.

“While type 1 diabetes is often referred to as ‘child-onset’ diabetes, this important study shows that only around one in five living with the condition are aged 20 years or younger, two-thirds are aged 20-64 years, and a further one in five are aged 65 years or older.”

“This condition does not stop at age 18 years – the children become adults, and the adults become elderly. All countries must examine and strengthen their diagnosis and care pathways for people of all ages living with type 1 diabetes,” Dr. Mathieu emphasized.

And in an accompanying editorial, Serena Jingchuan Guo, MD, PhD, and Hui Shao, MD, PhD, point out that most studies that estimate diabetes burden have focused on type 2 diabetes, noting, “type 1 diabetes faces the challenges of misdiagnosis, underdiagnosis, high risk of complications, and premature mortality.”

The insulin affordability issue is central, point out Dr. Guo and Dr. Shao of the Center for Drug Evaluation and Safety, department of pharmaceutical evaluation and policy, University of Florida College of Pharmacy, Gainesville.

“Countries need to strengthen the price regulation and reimbursement policy for insulin while building subsidy programs to ensure insulin access and to cope with the growing demand for insulin. Meanwhile, optimizing the insulin supply chain between manufacturers and patients while seeking alternative treatment options (for example, biosimilar products) will also improve the current situation,” they conclude.   

The study was funded by JDRF, of which four coauthors are employees. The editorialists have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Adding community health workers (CHW) to a primary care setting was linked with improved type 2 diabetes management in a safety-net population, new research indicates.

The researchers, led by Robert L. Ferrer, MD, MPH, with the department of family and community medicine at the University of Texas Health Science Center, San Antonio, enrolled 986 people in a Latino, inner-city cohort in primary care in San Antonio. Patients had uncontrolled type 2 diabetes and psychosocial risk factors. The study was published in Annals of Family Medicine.

The primary outcome measured was whether patients progressed through three stages of self-care: outreach (meeting face to face with a community health care worker), stabilization (collaborating with community health care workers to address life circumstances), and a third stage the researchers called “self-care generativity” (being able to manage blood sugar levels at home). The intervention lasted up to 12 weeks and had a 4-year follow-up.

Of participating patients, the researchers reported, 27% remained in outreach, 41% progressed to stabilization, 32% achieved self-care generativity status.

Coauthor Carlos Roberto Jaén, MD, PhD, also from the UT Health Science Center at San Antonio, said in an interview, “I don’t know any other intervention for diabetes that has 32% of participants having this kind of effect 4 years later.”

Dr. Jaén added that the study is unusual in that it had a 4-year follow-up and showed positive effects throughout that period, as most CHW studies have followed patients only up to one year.

The positive results over the 4 years after a short intervention “is a testimony of the power of intervention,” he said.

A1c drops with more progress in the intervention

The secondary outcome was change in hemoglobin A1c and need for urgent care or emergency department or hospital care.

Study participants who worked with a CHW – regardless of which group they were in at the end of the intervention – collectively saw a 2% drop in blood sugar.

Over a similar time period to when the study was conducted, the researchers analyzed 27,000 A1c measurements of patients with type 2 diabetes in a comparator group. For these patients, who did not receive the study intervention but were part of the same practice as those who received the intervention, the researchers observed a reduction in A1c levels of 0.05%.

Among the study participants, for those who remained in outreach, hospital visits were 6% higher than for those who advanced to the level of self-care generativity, but this difference was not statistically significant. Hospital visits were 90% higher for those who achieved stabilization versus those who remained in outreach (P = .014) The average count of emergency department visits was 74% higher for those who achieved stabilization versus those who achieved self-care generativity, and 31% higher in the group remaining at outreach versus those who reached the highest level of self-care.
 

Advantages of community workers

In San Antonio, the authors noted, type 2 diabetes prevalence is high: 15.5% of its 1.6 million residents have been diagnosed with the disease.

The CHWs built trust with patients and helped them set goals, navigate the health system and connect to community resources. They worked with behavioral health clinicians, nurse care managers, and medical assistants toward population management.

“Community health workers’ detailed understanding of patients’ circumstances help to tailor their care rather than apply fixed interventions,” the authors wrote.

Ricardo Correa, MD, director of the endocrinology, diabetes, and metabolism fellowship program in the University of Arizona, Phoenix, who was not involved with the study, said in an interview he was not surprised by the positive results.

He described the difference when CHWs get involved with type 2 diabetes care, particularly in the Latino community.

“They understand the culture, not just the language,” he said. “They have the trust of the community.”

It’s different when a provider not from the community tells a person with type 2 diabetes he or she needs to eat healthier or exercise more, he said.

The CHW can understand, for instance, that the nearest fresh market may be two towns away and open only on Saturdays and the parks are not safe for exercise outside at certain times of the day. Then they can help the patient find a sustainable solution.

“Community workers also won’t be looking at your immigration status,” something important to many in the Latino community, he explained.

Though this study looked at type 2 diabetes management, community health workers are also effective in other areas, he explained, such as increasing COVID-19 vaccinations, also do them being trustworthy and understanding.
 

Other study strengths

The group of people with type 2 diabetes they studied has the highest rates of poverty – “the poorest of the poor” – and the highest rates of diabetes-related amputations in San Antonio, Dr. Jaén said.

The intervention “is more focused on what people want to do, less so on the disease,” he explained. People are asked what goals they want to achieve and how the care team can help.

“It becomes an alliance between the community health worker and the patient,” he continued.

Others interested in implementing a program should know that building that relationship takes time and takes a broad multidisciplinary team working together, he said. “We would not necessarily see these effects in 6 months. You have to use a larger perspective.”

The researchers include with this study under the first-page tab “more online” access to tools, including resources for training, for others who want to implement such a program.

The study authors and Dr. Correa reported no relevant financial relationships.

Adding community health workers (CHW) to a primary care setting was linked with improved type 2 diabetes management in a safety-net population, new research indicates.

The researchers, led by Robert L. Ferrer, MD, MPH, with the department of family and community medicine at the University of Texas Health Science Center, San Antonio, enrolled 986 people in a Latino, inner-city cohort in primary care in San Antonio. Patients had uncontrolled type 2 diabetes and psychosocial risk factors. The study was published in Annals of Family Medicine.

The primary outcome measured was whether patients progressed through three stages of self-care: outreach (meeting face to face with a community health care worker), stabilization (collaborating with community health care workers to address life circumstances), and a third stage the researchers called “self-care generativity” (being able to manage blood sugar levels at home). The intervention lasted up to 12 weeks and had a 4-year follow-up.

Of participating patients, the researchers reported, 27% remained in outreach, 41% progressed to stabilization, 32% achieved self-care generativity status.

Coauthor Carlos Roberto Jaén, MD, PhD, also from the UT Health Science Center at San Antonio, said in an interview, “I don’t know any other intervention for diabetes that has 32% of participants having this kind of effect 4 years later.”

Dr. Jaén added that the study is unusual in that it had a 4-year follow-up and showed positive effects throughout that period, as most CHW studies have followed patients only up to one year.

The positive results over the 4 years after a short intervention “is a testimony of the power of intervention,” he said.

A1c drops with more progress in the intervention

The secondary outcome was change in hemoglobin A1c and need for urgent care or emergency department or hospital care.

Study participants who worked with a CHW – regardless of which group they were in at the end of the intervention – collectively saw a 2% drop in blood sugar.

Over a similar time period to when the study was conducted, the researchers analyzed 27,000 A1c measurements of patients with type 2 diabetes in a comparator group. For these patients, who did not receive the study intervention but were part of the same practice as those who received the intervention, the researchers observed a reduction in A1c levels of 0.05%.

Among the study participants, for those who remained in outreach, hospital visits were 6% higher than for those who advanced to the level of self-care generativity, but this difference was not statistically significant. Hospital visits were 90% higher for those who achieved stabilization versus those who remained in outreach (P = .014) The average count of emergency department visits was 74% higher for those who achieved stabilization versus those who achieved self-care generativity, and 31% higher in the group remaining at outreach versus those who reached the highest level of self-care.
 

Advantages of community workers

In San Antonio, the authors noted, type 2 diabetes prevalence is high: 15.5% of its 1.6 million residents have been diagnosed with the disease.

The CHWs built trust with patients and helped them set goals, navigate the health system and connect to community resources. They worked with behavioral health clinicians, nurse care managers, and medical assistants toward population management.

“Community health workers’ detailed understanding of patients’ circumstances help to tailor their care rather than apply fixed interventions,” the authors wrote.

Ricardo Correa, MD, director of the endocrinology, diabetes, and metabolism fellowship program in the University of Arizona, Phoenix, who was not involved with the study, said in an interview he was not surprised by the positive results.

He described the difference when CHWs get involved with type 2 diabetes care, particularly in the Latino community.

“They understand the culture, not just the language,” he said. “They have the trust of the community.”

It’s different when a provider not from the community tells a person with type 2 diabetes he or she needs to eat healthier or exercise more, he said.

The CHW can understand, for instance, that the nearest fresh market may be two towns away and open only on Saturdays and the parks are not safe for exercise outside at certain times of the day. Then they can help the patient find a sustainable solution.

“Community workers also won’t be looking at your immigration status,” something important to many in the Latino community, he explained.

Though this study looked at type 2 diabetes management, community health workers are also effective in other areas, he explained, such as increasing COVID-19 vaccinations, also do them being trustworthy and understanding.
 

Other study strengths

The group of people with type 2 diabetes they studied has the highest rates of poverty – “the poorest of the poor” – and the highest rates of diabetes-related amputations in San Antonio, Dr. Jaén said.

The intervention “is more focused on what people want to do, less so on the disease,” he explained. People are asked what goals they want to achieve and how the care team can help.

“It becomes an alliance between the community health worker and the patient,” he continued.

Others interested in implementing a program should know that building that relationship takes time and takes a broad multidisciplinary team working together, he said. “We would not necessarily see these effects in 6 months. You have to use a larger perspective.”

The researchers include with this study under the first-page tab “more online” access to tools, including resources for training, for others who want to implement such a program.

The study authors and Dr. Correa reported no relevant financial relationships.

Adding community health workers (CHW) to a primary care setting was linked with improved type 2 diabetes management in a safety-net population, new research indicates.

The researchers, led by Robert L. Ferrer, MD, MPH, with the department of family and community medicine at the University of Texas Health Science Center, San Antonio, enrolled 986 people in a Latino, inner-city cohort in primary care in San Antonio. Patients had uncontrolled type 2 diabetes and psychosocial risk factors. The study was published in Annals of Family Medicine.

The primary outcome measured was whether patients progressed through three stages of self-care: outreach (meeting face to face with a community health care worker), stabilization (collaborating with community health care workers to address life circumstances), and a third stage the researchers called “self-care generativity” (being able to manage blood sugar levels at home). The intervention lasted up to 12 weeks and had a 4-year follow-up.

Of participating patients, the researchers reported, 27% remained in outreach, 41% progressed to stabilization, 32% achieved self-care generativity status.

Coauthor Carlos Roberto Jaén, MD, PhD, also from the UT Health Science Center at San Antonio, said in an interview, “I don’t know any other intervention for diabetes that has 32% of participants having this kind of effect 4 years later.”

Dr. Jaén added that the study is unusual in that it had a 4-year follow-up and showed positive effects throughout that period, as most CHW studies have followed patients only up to one year.

The positive results over the 4 years after a short intervention “is a testimony of the power of intervention,” he said.

A1c drops with more progress in the intervention

The secondary outcome was change in hemoglobin A1c and need for urgent care or emergency department or hospital care.

Study participants who worked with a CHW – regardless of which group they were in at the end of the intervention – collectively saw a 2% drop in blood sugar.

Over a similar time period to when the study was conducted, the researchers analyzed 27,000 A1c measurements of patients with type 2 diabetes in a comparator group. For these patients, who did not receive the study intervention but were part of the same practice as those who received the intervention, the researchers observed a reduction in A1c levels of 0.05%.

Among the study participants, for those who remained in outreach, hospital visits were 6% higher than for those who advanced to the level of self-care generativity, but this difference was not statistically significant. Hospital visits were 90% higher for those who achieved stabilization versus those who remained in outreach (P = .014) The average count of emergency department visits was 74% higher for those who achieved stabilization versus those who achieved self-care generativity, and 31% higher in the group remaining at outreach versus those who reached the highest level of self-care.
 

Advantages of community workers

In San Antonio, the authors noted, type 2 diabetes prevalence is high: 15.5% of its 1.6 million residents have been diagnosed with the disease.

The CHWs built trust with patients and helped them set goals, navigate the health system and connect to community resources. They worked with behavioral health clinicians, nurse care managers, and medical assistants toward population management.

“Community health workers’ detailed understanding of patients’ circumstances help to tailor their care rather than apply fixed interventions,” the authors wrote.

Ricardo Correa, MD, director of the endocrinology, diabetes, and metabolism fellowship program in the University of Arizona, Phoenix, who was not involved with the study, said in an interview he was not surprised by the positive results.

He described the difference when CHWs get involved with type 2 diabetes care, particularly in the Latino community.

“They understand the culture, not just the language,” he said. “They have the trust of the community.”

It’s different when a provider not from the community tells a person with type 2 diabetes he or she needs to eat healthier or exercise more, he said.

The CHW can understand, for instance, that the nearest fresh market may be two towns away and open only on Saturdays and the parks are not safe for exercise outside at certain times of the day. Then they can help the patient find a sustainable solution.

“Community workers also won’t be looking at your immigration status,” something important to many in the Latino community, he explained.

Though this study looked at type 2 diabetes management, community health workers are also effective in other areas, he explained, such as increasing COVID-19 vaccinations, also do them being trustworthy and understanding.
 

Other study strengths

The group of people with type 2 diabetes they studied has the highest rates of poverty – “the poorest of the poor” – and the highest rates of diabetes-related amputations in San Antonio, Dr. Jaén said.

The intervention “is more focused on what people want to do, less so on the disease,” he explained. People are asked what goals they want to achieve and how the care team can help.

“It becomes an alliance between the community health worker and the patient,” he continued.

Others interested in implementing a program should know that building that relationship takes time and takes a broad multidisciplinary team working together, he said. “We would not necessarily see these effects in 6 months. You have to use a larger perspective.”

The researchers include with this study under the first-page tab “more online” access to tools, including resources for training, for others who want to implement such a program.

The study authors and Dr. Correa reported no relevant financial relationships.

Doctors caring for patients taking steroids now have broader flexibility for which drugs to use to prevent osteoporosis associated with the medications.

The American College of Rheumatology (ACR) has released an updated guideline that advises treatment providers on when and how long to prescribe therapies that prevent or treat glucocorticoid-induced osteoporosis (GIOP). Since the ACR last updated the guideline in 2017, the Food and Drug Administration has approved new treatments for osteoporosis, which are now included in the recommendations.

The new guideline also advises physicians that they may need to transition patients to a second treatment after concluding a first course – so-called sequential therapy – to better protect them against bone loss and fracture. It also offers detailed instructions for which drugs to use, when, and how long these medications should be administered for patients taking glucocorticoids over a long period of time.

The guideline’s inclusion of sequential therapy is significant and will be helpful to practicing clinicians, according to S.B. Tanner IV, MD, director of the Osteoporosis Clinic at Vanderbilt Health, Nashville, Tenn.

“For the first time, the ACR has offered guidance for starting and stopping treatments,” Dr. Tanner said. “This guideline supports awareness that osteoporosis is lifelong – something that will consistently need monitoring.”

An estimated 2.5 million Americans use glucocorticoids, according to a 2013 study in Arthritis Care & Research. Meanwhile, a 2019 study of residents in Denmark found 3% of people in the country were prescribed glucocorticoids annually. That study estimated 54% of glucocorticoid users were female and found the percentage of people taking glucocorticoids increased with age.

Glucocorticoids are used to treat a variety of inflammatory conditions, from multiple sclerosis to lupus, and often are prescribed to transplant patients to prevent their immune systems from rejecting new organs. When taken over time these medications can cause osteoporosis, which in turn raises the risk of fracture.

More than 10% of patients who receive long-term glucocorticoid treatment are diagnosed with clinical fractures. In addition, even low-dose glucocorticoid therapy is associated with a bone loss rate of 10% per year for a patient.

Osteoporosis prevention

After stopping some prevention therapies for GIOP, a high risk of bone loss or fracture still persists, according to Linda A. Russell, MD, director of the Osteoporosis and Metabolic Bone Health Center for the Hospital for Special Surgery, New York, and co-principal investigator of the new guideline.

“We wanted to be sure the need for sequential treatment is adequately communicated, including to patients who might not know they need to start a second medication,” Dr. Russell said.

Physicians and patients must be aware that when completing a course of one GIOP treatment, another drug for the condition should be started, as specified in the guideline.

“Early intervention can prevent glucocorticoid-induced fractures that can lead to substantial morbidity and increased mortality,” said Mary Beth Humphrey, MD, PhD, interim vice president for research at the University of Oklahoma Health Sciences Center in Oklahoma City and co-principal investigator of the ACR guideline.

Anyone can fracture

While age and other risk factors, including menopause, increase the risk of developing GIOP, bone loss can occur rapidly for a patient of any age.

Even a glucocorticoid dose as low as 2.5 mg will increase the risk of vertebral fractures, with some occurring as soon as 3 months after treatment starts, Dr. Humphrey said. For patients taking up to 7.5 mg daily, the risk of vertebral fracture doubles. Doses greater than 10 mg daily for more than 3 months raise the likelihood of a vertebral fracture by a factor of 14, and result in a 300% increase in the likelihood of hip fractures, according to Dr. Humphrey.

“When on steroids, even patients with high bone density scores can fracture,” Dr. Tanner said. “The 2017 guideline was almost too elaborate in its effort to calculate risk. The updated guideline acknowledges moderate risk and suggests that this is a group of patients who need treatment.”
 

Rank ordering adds flexibility

The updated ACR guideline no longer ranks medications based on patient fracture data, side effects, cost care, and whether the drug is provided through injection, pill, or IV.

All of the preventive treatments the panel recommends reduce the risk of steroid-induced bone loss, Dr. Humphrey said.

“We thought the 2017 guideline was too restrictive,” Dr. Russell said. “We’re giving physicians and patients more leeway to choose a medication based on their preferences.”

Patient preference of delivery mechanism – such as a desire for pills only – can now be weighed more heavily into drug treatment decisions.

“In the exam room, there are three dynamics going on: What the patient wants, what the doctor knows is most effective, and what the insurer will pay,” Dr. Tanner said. “Doing away with rank ordering opens up the conversation beyond cost to consider all those factors.”

The guideline team conducted a systematic literature review for clinical questions on nonpharmacologic and pharmacologic treatment addressed in the 2017 guideline, and for questions on new pharmacologic treatments, discontinuation of medications, and sequential and combination therapy. The voting panel consisted of two patient representatives and 13 experts representing adult and pediatric rheumatology and endocrinology, nephrology, and gastroenterology.

A full manuscript has been submitted for publication in Arthritis & Rheumatology and Arthritis Care and Research for peer review, and is expected to publish in early 2023.

Dr. Humphrey and Dr. Russell, the co-principal investigators for the guideline, and Dr. Rubin have disclosed no relevant financial relationships. Dr. Tanner reported a current research grant funded by Amgen through the University of Alabama at Birmingham and being a paid course instructor for the International Society for Clinical Densitometry bone density course, Osteoporosis Essentials.

A version of this article first appeared on Medscape.com.

Doctors caring for patients taking steroids now have broader flexibility for which drugs to use to prevent osteoporosis associated with the medications.

The American College of Rheumatology (ACR) has released an updated guideline that advises treatment providers on when and how long to prescribe therapies that prevent or treat glucocorticoid-induced osteoporosis (GIOP). Since the ACR last updated the guideline in 2017, the Food and Drug Administration has approved new treatments for osteoporosis, which are now included in the recommendations.

The new guideline also advises physicians that they may need to transition patients to a second treatment after concluding a first course – so-called sequential therapy – to better protect them against bone loss and fracture. It also offers detailed instructions for which drugs to use, when, and how long these medications should be administered for patients taking glucocorticoids over a long period of time.

The guideline’s inclusion of sequential therapy is significant and will be helpful to practicing clinicians, according to S.B. Tanner IV, MD, director of the Osteoporosis Clinic at Vanderbilt Health, Nashville, Tenn.

“For the first time, the ACR has offered guidance for starting and stopping treatments,” Dr. Tanner said. “This guideline supports awareness that osteoporosis is lifelong – something that will consistently need monitoring.”

An estimated 2.5 million Americans use glucocorticoids, according to a 2013 study in Arthritis Care & Research. Meanwhile, a 2019 study of residents in Denmark found 3% of people in the country were prescribed glucocorticoids annually. That study estimated 54% of glucocorticoid users were female and found the percentage of people taking glucocorticoids increased with age.

Glucocorticoids are used to treat a variety of inflammatory conditions, from multiple sclerosis to lupus, and often are prescribed to transplant patients to prevent their immune systems from rejecting new organs. When taken over time these medications can cause osteoporosis, which in turn raises the risk of fracture.

More than 10% of patients who receive long-term glucocorticoid treatment are diagnosed with clinical fractures. In addition, even low-dose glucocorticoid therapy is associated with a bone loss rate of 10% per year for a patient.

Osteoporosis prevention

After stopping some prevention therapies for GIOP, a high risk of bone loss or fracture still persists, according to Linda A. Russell, MD, director of the Osteoporosis and Metabolic Bone Health Center for the Hospital for Special Surgery, New York, and co-principal investigator of the new guideline.

“We wanted to be sure the need for sequential treatment is adequately communicated, including to patients who might not know they need to start a second medication,” Dr. Russell said.

Physicians and patients must be aware that when completing a course of one GIOP treatment, another drug for the condition should be started, as specified in the guideline.

“Early intervention can prevent glucocorticoid-induced fractures that can lead to substantial morbidity and increased mortality,” said Mary Beth Humphrey, MD, PhD, interim vice president for research at the University of Oklahoma Health Sciences Center in Oklahoma City and co-principal investigator of the ACR guideline.

Anyone can fracture

While age and other risk factors, including menopause, increase the risk of developing GIOP, bone loss can occur rapidly for a patient of any age.

Even a glucocorticoid dose as low as 2.5 mg will increase the risk of vertebral fractures, with some occurring as soon as 3 months after treatment starts, Dr. Humphrey said. For patients taking up to 7.5 mg daily, the risk of vertebral fracture doubles. Doses greater than 10 mg daily for more than 3 months raise the likelihood of a vertebral fracture by a factor of 14, and result in a 300% increase in the likelihood of hip fractures, according to Dr. Humphrey.

“When on steroids, even patients with high bone density scores can fracture,” Dr. Tanner said. “The 2017 guideline was almost too elaborate in its effort to calculate risk. The updated guideline acknowledges moderate risk and suggests that this is a group of patients who need treatment.”
 

Rank ordering adds flexibility

The updated ACR guideline no longer ranks medications based on patient fracture data, side effects, cost care, and whether the drug is provided through injection, pill, or IV.

All of the preventive treatments the panel recommends reduce the risk of steroid-induced bone loss, Dr. Humphrey said.

“We thought the 2017 guideline was too restrictive,” Dr. Russell said. “We’re giving physicians and patients more leeway to choose a medication based on their preferences.”

Patient preference of delivery mechanism – such as a desire for pills only – can now be weighed more heavily into drug treatment decisions.

“In the exam room, there are three dynamics going on: What the patient wants, what the doctor knows is most effective, and what the insurer will pay,” Dr. Tanner said. “Doing away with rank ordering opens up the conversation beyond cost to consider all those factors.”

The guideline team conducted a systematic literature review for clinical questions on nonpharmacologic and pharmacologic treatment addressed in the 2017 guideline, and for questions on new pharmacologic treatments, discontinuation of medications, and sequential and combination therapy. The voting panel consisted of two patient representatives and 13 experts representing adult and pediatric rheumatology and endocrinology, nephrology, and gastroenterology.

A full manuscript has been submitted for publication in Arthritis & Rheumatology and Arthritis Care and Research for peer review, and is expected to publish in early 2023.

Dr. Humphrey and Dr. Russell, the co-principal investigators for the guideline, and Dr. Rubin have disclosed no relevant financial relationships. Dr. Tanner reported a current research grant funded by Amgen through the University of Alabama at Birmingham and being a paid course instructor for the International Society for Clinical Densitometry bone density course, Osteoporosis Essentials.

A version of this article first appeared on Medscape.com.

Doctors caring for patients taking steroids now have broader flexibility for which drugs to use to prevent osteoporosis associated with the medications.

The American College of Rheumatology (ACR) has released an updated guideline that advises treatment providers on when and how long to prescribe therapies that prevent or treat glucocorticoid-induced osteoporosis (GIOP). Since the ACR last updated the guideline in 2017, the Food and Drug Administration has approved new treatments for osteoporosis, which are now included in the recommendations.

The new guideline also advises physicians that they may need to transition patients to a second treatment after concluding a first course – so-called sequential therapy – to better protect them against bone loss and fracture. It also offers detailed instructions for which drugs to use, when, and how long these medications should be administered for patients taking glucocorticoids over a long period of time.

The guideline’s inclusion of sequential therapy is significant and will be helpful to practicing clinicians, according to S.B. Tanner IV, MD, director of the Osteoporosis Clinic at Vanderbilt Health, Nashville, Tenn.

“For the first time, the ACR has offered guidance for starting and stopping treatments,” Dr. Tanner said. “This guideline supports awareness that osteoporosis is lifelong – something that will consistently need monitoring.”

An estimated 2.5 million Americans use glucocorticoids, according to a 2013 study in Arthritis Care & Research. Meanwhile, a 2019 study of residents in Denmark found 3% of people in the country were prescribed glucocorticoids annually. That study estimated 54% of glucocorticoid users were female and found the percentage of people taking glucocorticoids increased with age.

Glucocorticoids are used to treat a variety of inflammatory conditions, from multiple sclerosis to lupus, and often are prescribed to transplant patients to prevent their immune systems from rejecting new organs. When taken over time these medications can cause osteoporosis, which in turn raises the risk of fracture.

More than 10% of patients who receive long-term glucocorticoid treatment are diagnosed with clinical fractures. In addition, even low-dose glucocorticoid therapy is associated with a bone loss rate of 10% per year for a patient.

Osteoporosis prevention

After stopping some prevention therapies for GIOP, a high risk of bone loss or fracture still persists, according to Linda A. Russell, MD, director of the Osteoporosis and Metabolic Bone Health Center for the Hospital for Special Surgery, New York, and co-principal investigator of the new guideline.

“We wanted to be sure the need for sequential treatment is adequately communicated, including to patients who might not know they need to start a second medication,” Dr. Russell said.

Physicians and patients must be aware that when completing a course of one GIOP treatment, another drug for the condition should be started, as specified in the guideline.

“Early intervention can prevent glucocorticoid-induced fractures that can lead to substantial morbidity and increased mortality,” said Mary Beth Humphrey, MD, PhD, interim vice president for research at the University of Oklahoma Health Sciences Center in Oklahoma City and co-principal investigator of the ACR guideline.

Anyone can fracture

While age and other risk factors, including menopause, increase the risk of developing GIOP, bone loss can occur rapidly for a patient of any age.

Even a glucocorticoid dose as low as 2.5 mg will increase the risk of vertebral fractures, with some occurring as soon as 3 months after treatment starts, Dr. Humphrey said. For patients taking up to 7.5 mg daily, the risk of vertebral fracture doubles. Doses greater than 10 mg daily for more than 3 months raise the likelihood of a vertebral fracture by a factor of 14, and result in a 300% increase in the likelihood of hip fractures, according to Dr. Humphrey.

“When on steroids, even patients with high bone density scores can fracture,” Dr. Tanner said. “The 2017 guideline was almost too elaborate in its effort to calculate risk. The updated guideline acknowledges moderate risk and suggests that this is a group of patients who need treatment.”
 

Rank ordering adds flexibility

The updated ACR guideline no longer ranks medications based on patient fracture data, side effects, cost care, and whether the drug is provided through injection, pill, or IV.

All of the preventive treatments the panel recommends reduce the risk of steroid-induced bone loss, Dr. Humphrey said.

“We thought the 2017 guideline was too restrictive,” Dr. Russell said. “We’re giving physicians and patients more leeway to choose a medication based on their preferences.”

Patient preference of delivery mechanism – such as a desire for pills only – can now be weighed more heavily into drug treatment decisions.

“In the exam room, there are three dynamics going on: What the patient wants, what the doctor knows is most effective, and what the insurer will pay,” Dr. Tanner said. “Doing away with rank ordering opens up the conversation beyond cost to consider all those factors.”

The guideline team conducted a systematic literature review for clinical questions on nonpharmacologic and pharmacologic treatment addressed in the 2017 guideline, and for questions on new pharmacologic treatments, discontinuation of medications, and sequential and combination therapy. The voting panel consisted of two patient representatives and 13 experts representing adult and pediatric rheumatology and endocrinology, nephrology, and gastroenterology.

A full manuscript has been submitted for publication in Arthritis & Rheumatology and Arthritis Care and Research for peer review, and is expected to publish in early 2023.

Dr. Humphrey and Dr. Russell, the co-principal investigators for the guideline, and Dr. Rubin have disclosed no relevant financial relationships. Dr. Tanner reported a current research grant funded by Amgen through the University of Alabama at Birmingham and being a paid course instructor for the International Society for Clinical Densitometry bone density course, Osteoporosis Essentials.

A version of this article first appeared on Medscape.com.

People who stay up late may be at greater risk for type 2 diabetes and cardiovascular disease than those who turn in early, according to new research.

In the study involving 51 people, night owls metabolized fat less efficiently, showed less insulin sensitivity, and demonstrated lower physical fitness than early birds, lead author Steven K. Malin, PhD, of Rutgers University, New Brunswick, N.J., and colleagues reported.

Prior publications have suggested that night owls, formally known as “late chronotypes,” have an increased risk of obesity, type 2 diabetes, and cardiovascular disease, Dr. Malin said in an interview. But no previous research involved the gold-standard measurement tools used in this study, including euglycemic clamp and indirect calorimetry to quantify fat metabolism.

Dr. Malin also noted that this is the first study of its kind to characterize metabolism during both rest and exercise.

The study, published in Experimental Physiology, involved 24 early birds and 27 night owls classified by the Morning-Eveningness Questionnaire. All participants were sedentary, reporting less than one hour of structured exercise per week, and had metabolic syndrome according to Adult Treatment Panel III report criteria. Groups were otherwise demographically similar, with average ages in each group of approximately 54-55 years.

Compared with night owls, early birds were more physically active during the morning into midday. During exercise, they metabolized more fat and demonstrated greater physical fitness based on VO_2max readings. At rest, early birds also came out ahead – they had higher fat oxidation and non–oxidative glucose disposal, suggesting more sensitivity to insulin.

“Collectively, this work highlights and supports chronotype as a potential risk factor related to type 2 diabetes and cardiovascular disease risk,” the investigators concluded.
 

Night owls have less metabolic control

Jed Friedman, PhD, director of OU Health Harold Hamm Diabetes Center at the University of Oklahoma Health Sciences Center, Oklahoma City, praised the study for the size of the groups the researchers compared with each other and how well matched those groups were, as well as the “state-of-the-art” measurement tools employed.

The findings show that night owls have “less metabolic control,” Dr. Friedman said in an interview.

“That’s a term that’s frequently invoked in [regard to] prediabetes,” he said. “Blood sugar goes up, because when you’re eating a high carbohydrate diet, your cells aren’t metabolizing sugar properly. That tends to raise your risk for a lot of diseases.”

Dr. Friedman added that the findings align with those of previous studies that have linked less sleep with changes in brain biology, and therefore behavior, especially in dietary choices.

“When you’re tired, the mechanisms for appetite control go haywire,” Dr. Friedman explained. “The evidence suggests that sugar is the primary driver for what people eat when they’re tired. That obviously has implications for diabetes and metabolic syndrome. So sleeping more really can help you control cravings.”

Dr. Friedman also noted that people who are tired tend to engage in less physical activity, further increasing their risk of metabolic issues. To control this risk, he advised people to return to their circadian rhythms, which could mean forgetting the midnight snack.

“Having a daily pattern that’s in sync with chronicity, or these daily rhythms, is associated with greater health,” Dr. Friedman said. “We’re not really made to eat at night. I think this [study] kind of reinforces that.”
 

Can a night owl become an early bird?

When asked if a person’s natural circadian rhythm can be later, Dr. Malin responded that chronotypes may be dictated by genetics and age, as well as external drivers like work schedule. For these reasons, it’s “tricky” to answer whether night owls can turn into early birds and reap the potential health benefits of making that shift.

“Given that so many life factors can influence what our routine entails, it’s hard to know if we [can] truly change our chronotype or if rather we [can] learn to manage,” Dr. Malin said. “In either case, there is some work that suggests people can adopt earlier bedtimes and waketimes through practical recommendations.”

Specifically, he suggested increasing physical activity during the day, and adjusting bedtimes gradually by 15-minute increments.

“Go to bed 15 minutes earlier then wake up 15 minutes earlier,” Dr. Malin said. “In time, and depending on how things are going, this can expand to another 15-minute window. Then, during the earlier time waking up, a person can engage in light physical activity to help with promoting general fitness. If they can get outside with sunlight, that would be great too, as the natural sunlight would provide cues to the circadian system to adjust.”

The study was supported by the National Institutes of Health. The investigators and Dr. Friedman disclosed no conflicts of interest.

People who stay up late may be at greater risk for type 2 diabetes and cardiovascular disease than those who turn in early, according to new research.

In the study involving 51 people, night owls metabolized fat less efficiently, showed less insulin sensitivity, and demonstrated lower physical fitness than early birds, lead author Steven K. Malin, PhD, of Rutgers University, New Brunswick, N.J., and colleagues reported.

Prior publications have suggested that night owls, formally known as “late chronotypes,” have an increased risk of obesity, type 2 diabetes, and cardiovascular disease, Dr. Malin said in an interview. But no previous research involved the gold-standard measurement tools used in this study, including euglycemic clamp and indirect calorimetry to quantify fat metabolism.

Dr. Malin also noted that this is the first study of its kind to characterize metabolism during both rest and exercise.

The study, published in Experimental Physiology, involved 24 early birds and 27 night owls classified by the Morning-Eveningness Questionnaire. All participants were sedentary, reporting less than one hour of structured exercise per week, and had metabolic syndrome according to Adult Treatment Panel III report criteria. Groups were otherwise demographically similar, with average ages in each group of approximately 54-55 years.

Compared with night owls, early birds were more physically active during the morning into midday. During exercise, they metabolized more fat and demonstrated greater physical fitness based on VO_2max readings. At rest, early birds also came out ahead – they had higher fat oxidation and non–oxidative glucose disposal, suggesting more sensitivity to insulin.

“Collectively, this work highlights and supports chronotype as a potential risk factor related to type 2 diabetes and cardiovascular disease risk,” the investigators concluded.
 

Night owls have less metabolic control

Jed Friedman, PhD, director of OU Health Harold Hamm Diabetes Center at the University of Oklahoma Health Sciences Center, Oklahoma City, praised the study for the size of the groups the researchers compared with each other and how well matched those groups were, as well as the “state-of-the-art” measurement tools employed.

The findings show that night owls have “less metabolic control,” Dr. Friedman said in an interview.

“That’s a term that’s frequently invoked in [regard to] prediabetes,” he said. “Blood sugar goes up, because when you’re eating a high carbohydrate diet, your cells aren’t metabolizing sugar properly. That tends to raise your risk for a lot of diseases.”

Dr. Friedman added that the findings align with those of previous studies that have linked less sleep with changes in brain biology, and therefore behavior, especially in dietary choices.

“When you’re tired, the mechanisms for appetite control go haywire,” Dr. Friedman explained. “The evidence suggests that sugar is the primary driver for what people eat when they’re tired. That obviously has implications for diabetes and metabolic syndrome. So sleeping more really can help you control cravings.”

Dr. Friedman also noted that people who are tired tend to engage in less physical activity, further increasing their risk of metabolic issues. To control this risk, he advised people to return to their circadian rhythms, which could mean forgetting the midnight snack.

“Having a daily pattern that’s in sync with chronicity, or these daily rhythms, is associated with greater health,” Dr. Friedman said. “We’re not really made to eat at night. I think this [study] kind of reinforces that.”
 

Can a night owl become an early bird?

When asked if a person’s natural circadian rhythm can be later, Dr. Malin responded that chronotypes may be dictated by genetics and age, as well as external drivers like work schedule. For these reasons, it’s “tricky” to answer whether night owls can turn into early birds and reap the potential health benefits of making that shift.

“Given that so many life factors can influence what our routine entails, it’s hard to know if we [can] truly change our chronotype or if rather we [can] learn to manage,” Dr. Malin said. “In either case, there is some work that suggests people can adopt earlier bedtimes and waketimes through practical recommendations.”

Specifically, he suggested increasing physical activity during the day, and adjusting bedtimes gradually by 15-minute increments.

“Go to bed 15 minutes earlier then wake up 15 minutes earlier,” Dr. Malin said. “In time, and depending on how things are going, this can expand to another 15-minute window. Then, during the earlier time waking up, a person can engage in light physical activity to help with promoting general fitness. If they can get outside with sunlight, that would be great too, as the natural sunlight would provide cues to the circadian system to adjust.”

The study was supported by the National Institutes of Health. The investigators and Dr. Friedman disclosed no conflicts of interest.

People who stay up late may be at greater risk for type 2 diabetes and cardiovascular disease than those who turn in early, according to new research.

In the study involving 51 people, night owls metabolized fat less efficiently, showed less insulin sensitivity, and demonstrated lower physical fitness than early birds, lead author Steven K. Malin, PhD, of Rutgers University, New Brunswick, N.J., and colleagues reported.

Prior publications have suggested that night owls, formally known as “late chronotypes,” have an increased risk of obesity, type 2 diabetes, and cardiovascular disease, Dr. Malin said in an interview. But no previous research involved the gold-standard measurement tools used in this study, including euglycemic clamp and indirect calorimetry to quantify fat metabolism.

Dr. Malin also noted that this is the first study of its kind to characterize metabolism during both rest and exercise.

The study, published in Experimental Physiology, involved 24 early birds and 27 night owls classified by the Morning-Eveningness Questionnaire. All participants were sedentary, reporting less than one hour of structured exercise per week, and had metabolic syndrome according to Adult Treatment Panel III report criteria. Groups were otherwise demographically similar, with average ages in each group of approximately 54-55 years.

Compared with night owls, early birds were more physically active during the morning into midday. During exercise, they metabolized more fat and demonstrated greater physical fitness based on VO_2max readings. At rest, early birds also came out ahead – they had higher fat oxidation and non–oxidative glucose disposal, suggesting more sensitivity to insulin.

“Collectively, this work highlights and supports chronotype as a potential risk factor related to type 2 diabetes and cardiovascular disease risk,” the investigators concluded.
 

Night owls have less metabolic control

Jed Friedman, PhD, director of OU Health Harold Hamm Diabetes Center at the University of Oklahoma Health Sciences Center, Oklahoma City, praised the study for the size of the groups the researchers compared with each other and how well matched those groups were, as well as the “state-of-the-art” measurement tools employed.

The findings show that night owls have “less metabolic control,” Dr. Friedman said in an interview.

“That’s a term that’s frequently invoked in [regard to] prediabetes,” he said. “Blood sugar goes up, because when you’re eating a high carbohydrate diet, your cells aren’t metabolizing sugar properly. That tends to raise your risk for a lot of diseases.”

Dr. Friedman added that the findings align with those of previous studies that have linked less sleep with changes in brain biology, and therefore behavior, especially in dietary choices.

“When you’re tired, the mechanisms for appetite control go haywire,” Dr. Friedman explained. “The evidence suggests that sugar is the primary driver for what people eat when they’re tired. That obviously has implications for diabetes and metabolic syndrome. So sleeping more really can help you control cravings.”

Dr. Friedman also noted that people who are tired tend to engage in less physical activity, further increasing their risk of metabolic issues. To control this risk, he advised people to return to their circadian rhythms, which could mean forgetting the midnight snack.

“Having a daily pattern that’s in sync with chronicity, or these daily rhythms, is associated with greater health,” Dr. Friedman said. “We’re not really made to eat at night. I think this [study] kind of reinforces that.”
 

Can a night owl become an early bird?

When asked if a person’s natural circadian rhythm can be later, Dr. Malin responded that chronotypes may be dictated by genetics and age, as well as external drivers like work schedule. For these reasons, it’s “tricky” to answer whether night owls can turn into early birds and reap the potential health benefits of making that shift.

“Given that so many life factors can influence what our routine entails, it’s hard to know if we [can] truly change our chronotype or if rather we [can] learn to manage,” Dr. Malin said. “In either case, there is some work that suggests people can adopt earlier bedtimes and waketimes through practical recommendations.”

Specifically, he suggested increasing physical activity during the day, and adjusting bedtimes gradually by 15-minute increments.

“Go to bed 15 minutes earlier then wake up 15 minutes earlier,” Dr. Malin said. “In time, and depending on how things are going, this can expand to another 15-minute window. Then, during the earlier time waking up, a person can engage in light physical activity to help with promoting general fitness. If they can get outside with sunlight, that would be great too, as the natural sunlight would provide cues to the circadian system to adjust.”

The study was supported by the National Institutes of Health. The investigators and Dr. Friedman disclosed no conflicts of interest.

In a small cross-sectional study of 10- to 16-year-old girls with and without type 1 diabetes, both groups were equally physically active, based on their replies to the bone-specific physical activity questionnaire (BPAQ).

However, among the more sedentary girls (with BPAQ scores below the median), those with type 1 diabetes had worse markers of bone health in imaging tests compared with the girls without diabetes.

“The deleterious effect of [type 1 diabetes] on bone health in girls is most pronounced in those with less weight-bearing activity,” the researchers summarize in a poster presented at the annual meeting of the American Society of Bone and Mineral Research.

However, this is early research and further study is needed, the group cautions.

“Ongoing studies with objective measures of physical activity as well as interventional studies will clarify whether increasing physical activity may improve bone health and reduce fracture risk in this vulnerable group,” they conclude.

“If you look at the sedentary kids, there’s a big discrepancy between the kids who have diabetes and the control kids, and that’s if we’re looking at radius or tibia or trabecular bone density or estimated failure load,” senior author Deborah M. Mitchell, MD, said in an interview at the poster session.

However, “when we look at the kids who are more physically active, we’re really not seeing as much difference [in bone health] between the kids with and without diabetes,” said Dr. Mitchell, a pediatric endocrinologist at Massachusetts General Hospital and assistant professor at Harvard Medical School, Boston.

But she also acknowledged, “There’s all sorts of caveats, including that this is retrospective questionnaire data.”

However, if further, rigorous studies confirm these findings, “physical activity is potentially a really effective means of improving bone quality in kids with type 1 diabetes.”

“This study suggests that bone-loading physical activity can substantially improve skeletal health in children with [type 1 diabetes] and should provide hope for patients and their families that they can take some action to prevent or mitigate the effects of diabetes on bone,” coauthor and incoming ASBMR President Mary L. Bouxsein, PhD, told this news organization in an email.

“We interpret these data as an important reason to advocate for increased time in moderate to vigorous bone-loading activity,” said Dr. Bouxsein, professor, department of orthopedic surgery, Harvard Medical School, Boston, “though the ‘dose’ in terms of hours per day or episodes per week to promote optimal bone health is still to be determined.”
 

“Ongoing debate,” “need stronger proof”

Asked for comment, Laura K. Bachrach, MD, who was not involved with the research, noted: “Activity benefits the development of bone strength through effects on bone geometry more than ‘density,’ and conversely, lack of physical activity can compromise gains in cortical bone diameter and thickness.”

However, “there is ongoing debate about the impact of type 1 diabetes on bone health and the factor(s) determining risk,” Dr. Bachrach, a pediatric endocrinologist at Stanford Children’s Health, Palo Alto, Calif., told this news organization in an email.  

The current findings suggest “that physical activity in adolescent girls provided protection against potential adverse effects of type 1 diabetes,” said Dr. Bachrach, who spoke about bone fragility in childhood in a video commentary in 2021.

Study strengths, she noted, “include the rigor and expertise of the investigators, use of multiple surrogate measures that capture bone geometry/microarchitecture, as well as the inclusion of healthy local controls.”  

“The study is limited by the cross-sectional design and subjects who opted, or not, to be active,” she added. “Stronger proof of the protective effects of activity on bone health in type 1 diabetes would require a randomized longitudinal intervention study, as alluded to by the authors of the study.”
 

Hypothesis: Those with type 1 diabetes acquire less bone mass in early 20s

The excess fracture risk in children with type 1 diabetes has been previously reported and is 14%-35% higher than the fracture risk in children without diabetes, Dr. Bouxsein explained. And “between 30% to 50% of kids [with type 1 diabetes] will have a fracture before the age of 18, so the excess fracture risk in diabetes is not clinically obvious,” she added.

However, “several lines of evidence strongly suggest that bone mass and microarchitecture at the time of peak bone mass (early 20s) is a major determinant of fracture risk throughout the lifespan,” she noted.

“Our hypothesis,” Dr. Bouxsein said, “is that the metabolic disruptions of diabetes, when they are present during the acquisition of peak bone mass, interfere with optimal bone development, and therefore may contribute to increased fracture risk later in life.”

Dr. Bachrach agreed that “peak bone strength is achieved by early adulthood, making childhood and adolescence important times to optimize bone health,” and that “peak bone strength is a predictor of lifetime risk of osteoporosis.”

“The diagnosis of pediatric osteoporosis is made when a child or teen sustains a vertebral fracture or femur fracture with minimal or no trauma,” she explained. “The diagnosis can also be made in a pediatric patient with low BMD [bone mineral density] for age in combination with a history of several long-bone fractures.”

Dr. Mitchell noted that type 1 diabetes is associated with a higher risk of fractures, which is sixfold in adults. In another study, she said, the group showed that in 10- to 16-year-old girls who’ve only had diabetes for a few years, “trabecular bone density is lower, they have lower estimated failure load, and longitudinally when we follow them, at least at the radius, we’re seeing bone loss at a relatively young age when we wouldn’t be expecting to see bone loss.”
 

80 girls enrolled, half had type 1 diabetes

Researchers enrolled 36 girls with type 1 diabetes and 44 girls without type 1 diabetes (controls) who were a mean age of 14.7 years and most (92%) were White. The girls with and without diabetes had similar rates of previous fractures (44% and 51%).

Those with diabetes had been diagnosed at a mean age of 9 years and had had diabetes for a mean of 4.6 years.

Researchers calculated participants’ total BPAQ scores based on type, duration, and frequency of bone-loading activities. 

Participants had dual-energy X-ray absorptiometry scans to determine areal bone mineral density (BMD) at the total hip, femoral neck, lumbar spine, and whole body less head.

They also had high-resolution peripheral quantitative computed tomography at the distal tibia and radius to determine volumetric BMD, bone microarchitecture, and estimated bone strength (calculated using microfinite element analysis).

The two groups had similar total BPAQ scores (57.3 and 64.6), with a median score of 49.

BPAQ scores were positively associated with areal BMD at all sites (whole body, lumbar spine, total hip, femoral neck, and 1/3 radius) and with trabecular BMD and estimated failure load at the distal radius and tibia (P < .05 for all, adjusted for bone age).

Among participants with low physical activity (BPAQ below the median), compared with controls, those with type 1 diabetes had 6.6% lower aerial BMD at the lumbar spine (0.868 vs. 0.929 g/cm³; P = .04), 8% lower trabecular volumetric BMD at the distal radius (128.5 vs. 156.8 mg/cm³; P = .01), and 12% lower estimated failure load. Results at the distal tibia were similar.
 

Next steps

“More observational studies in males and females across a broader age spectrum would be helpful,” Dr. Bachrach noted. “The ‘gold standard’ model would be a long-term randomized controlled activity intervention study.”

“Further studies are underway [in girls and boys] using objective measures of activity including accelerometry and longitudinal observation to help confirm the findings from the current study,” Dr. Bouxsein said. “Ultimately, trials of activity interventions in children with [type 1 diabetes] will be the gold standard to determine to what extent physical activity can mitigate bone disease in [type 1 diabetes],” she agreed.

The study authors and Dr. Bachrach have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

In a small cross-sectional study of 10- to 16-year-old girls with and without type 1 diabetes, both groups were equally physically active, based on their replies to the bone-specific physical activity questionnaire (BPAQ).

However, among the more sedentary girls (with BPAQ scores below the median), those with type 1 diabetes had worse markers of bone health in imaging tests compared with the girls without diabetes.

“The deleterious effect of [type 1 diabetes] on bone health in girls is most pronounced in those with less weight-bearing activity,” the researchers summarize in a poster presented at the annual meeting of the American Society of Bone and Mineral Research.

However, this is early research and further study is needed, the group cautions.

“Ongoing studies with objective measures of physical activity as well as interventional studies will clarify whether increasing physical activity may improve bone health and reduce fracture risk in this vulnerable group,” they conclude.

“If you look at the sedentary kids, there’s a big discrepancy between the kids who have diabetes and the control kids, and that’s if we’re looking at radius or tibia or trabecular bone density or estimated failure load,” senior author Deborah M. Mitchell, MD, said in an interview at the poster session.

However, “when we look at the kids who are more physically active, we’re really not seeing as much difference [in bone health] between the kids with and without diabetes,” said Dr. Mitchell, a pediatric endocrinologist at Massachusetts General Hospital and assistant professor at Harvard Medical School, Boston.

But she also acknowledged, “There’s all sorts of caveats, including that this is retrospective questionnaire data.”

However, if further, rigorous studies confirm these findings, “physical activity is potentially a really effective means of improving bone quality in kids with type 1 diabetes.”

“This study suggests that bone-loading physical activity can substantially improve skeletal health in children with [type 1 diabetes] and should provide hope for patients and their families that they can take some action to prevent or mitigate the effects of diabetes on bone,” coauthor and incoming ASBMR President Mary L. Bouxsein, PhD, told this news organization in an email.

“We interpret these data as an important reason to advocate for increased time in moderate to vigorous bone-loading activity,” said Dr. Bouxsein, professor, department of orthopedic surgery, Harvard Medical School, Boston, “though the ‘dose’ in terms of hours per day or episodes per week to promote optimal bone health is still to be determined.”
 

“Ongoing debate,” “need stronger proof”

Asked for comment, Laura K. Bachrach, MD, who was not involved with the research, noted: “Activity benefits the development of bone strength through effects on bone geometry more than ‘density,’ and conversely, lack of physical activity can compromise gains in cortical bone diameter and thickness.”

However, “there is ongoing debate about the impact of type 1 diabetes on bone health and the factor(s) determining risk,” Dr. Bachrach, a pediatric endocrinologist at Stanford Children’s Health, Palo Alto, Calif., told this news organization in an email.  

The current findings suggest “that physical activity in adolescent girls provided protection against potential adverse effects of type 1 diabetes,” said Dr. Bachrach, who spoke about bone fragility in childhood in a video commentary in 2021.

Study strengths, she noted, “include the rigor and expertise of the investigators, use of multiple surrogate measures that capture bone geometry/microarchitecture, as well as the inclusion of healthy local controls.”  

“The study is limited by the cross-sectional design and subjects who opted, or not, to be active,” she added. “Stronger proof of the protective effects of activity on bone health in type 1 diabetes would require a randomized longitudinal intervention study, as alluded to by the authors of the study.”
 

Hypothesis: Those with type 1 diabetes acquire less bone mass in early 20s

The excess fracture risk in children with type 1 diabetes has been previously reported and is 14%-35% higher than the fracture risk in children without diabetes, Dr. Bouxsein explained. And “between 30% to 50% of kids [with type 1 diabetes] will have a fracture before the age of 18, so the excess fracture risk in diabetes is not clinically obvious,” she added.

However, “several lines of evidence strongly suggest that bone mass and microarchitecture at the time of peak bone mass (early 20s) is a major determinant of fracture risk throughout the lifespan,” she noted.

“Our hypothesis,” Dr. Bouxsein said, “is that the metabolic disruptions of diabetes, when they are present during the acquisition of peak bone mass, interfere with optimal bone development, and therefore may contribute to increased fracture risk later in life.”

Dr. Bachrach agreed that “peak bone strength is achieved by early adulthood, making childhood and adolescence important times to optimize bone health,” and that “peak bone strength is a predictor of lifetime risk of osteoporosis.”

“The diagnosis of pediatric osteoporosis is made when a child or teen sustains a vertebral fracture or femur fracture with minimal or no trauma,” she explained. “The diagnosis can also be made in a pediatric patient with low BMD [bone mineral density] for age in combination with a history of several long-bone fractures.”

Dr. Mitchell noted that type 1 diabetes is associated with a higher risk of fractures, which is sixfold in adults. In another study, she said, the group showed that in 10- to 16-year-old girls who’ve only had diabetes for a few years, “trabecular bone density is lower, they have lower estimated failure load, and longitudinally when we follow them, at least at the radius, we’re seeing bone loss at a relatively young age when we wouldn’t be expecting to see bone loss.”
 

80 girls enrolled, half had type 1 diabetes

Researchers enrolled 36 girls with type 1 diabetes and 44 girls without type 1 diabetes (controls) who were a mean age of 14.7 years and most (92%) were White. The girls with and without diabetes had similar rates of previous fractures (44% and 51%).

Those with diabetes had been diagnosed at a mean age of 9 years and had had diabetes for a mean of 4.6 years.

Researchers calculated participants’ total BPAQ scores based on type, duration, and frequency of bone-loading activities. 

Participants had dual-energy X-ray absorptiometry scans to determine areal bone mineral density (BMD) at the total hip, femoral neck, lumbar spine, and whole body less head.

They also had high-resolution peripheral quantitative computed tomography at the distal tibia and radius to determine volumetric BMD, bone microarchitecture, and estimated bone strength (calculated using microfinite element analysis).

The two groups had similar total BPAQ scores (57.3 and 64.6), with a median score of 49.

BPAQ scores were positively associated with areal BMD at all sites (whole body, lumbar spine, total hip, femoral neck, and 1/3 radius) and with trabecular BMD and estimated failure load at the distal radius and tibia (P < .05 for all, adjusted for bone age).

Among participants with low physical activity (BPAQ below the median), compared with controls, those with type 1 diabetes had 6.6% lower aerial BMD at the lumbar spine (0.868 vs. 0.929 g/cm³; P = .04), 8% lower trabecular volumetric BMD at the distal radius (128.5 vs. 156.8 mg/cm³; P = .01), and 12% lower estimated failure load. Results at the distal tibia were similar.
 

Next steps

“More observational studies in males and females across a broader age spectrum would be helpful,” Dr. Bachrach noted. “The ‘gold standard’ model would be a long-term randomized controlled activity intervention study.”

“Further studies are underway [in girls and boys] using objective measures of activity including accelerometry and longitudinal observation to help confirm the findings from the current study,” Dr. Bouxsein said. “Ultimately, trials of activity interventions in children with [type 1 diabetes] will be the gold standard to determine to what extent physical activity can mitigate bone disease in [type 1 diabetes],” she agreed.

The study authors and Dr. Bachrach have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

In a small cross-sectional study of 10- to 16-year-old girls with and without type 1 diabetes, both groups were equally physically active, based on their replies to the bone-specific physical activity questionnaire (BPAQ).

However, among the more sedentary girls (with BPAQ scores below the median), those with type 1 diabetes had worse markers of bone health in imaging tests compared with the girls without diabetes.

“The deleterious effect of [type 1 diabetes] on bone health in girls is most pronounced in those with less weight-bearing activity,” the researchers summarize in a poster presented at the annual meeting of the American Society of Bone and Mineral Research.

However, this is early research and further study is needed, the group cautions.

“Ongoing studies with objective measures of physical activity as well as interventional studies will clarify whether increasing physical activity may improve bone health and reduce fracture risk in this vulnerable group,” they conclude.

“If you look at the sedentary kids, there’s a big discrepancy between the kids who have diabetes and the control kids, and that’s if we’re looking at radius or tibia or trabecular bone density or estimated failure load,” senior author Deborah M. Mitchell, MD, said in an interview at the poster session.

However, “when we look at the kids who are more physically active, we’re really not seeing as much difference [in bone health] between the kids with and without diabetes,” said Dr. Mitchell, a pediatric endocrinologist at Massachusetts General Hospital and assistant professor at Harvard Medical School, Boston.

But she also acknowledged, “There’s all sorts of caveats, including that this is retrospective questionnaire data.”

However, if further, rigorous studies confirm these findings, “physical activity is potentially a really effective means of improving bone quality in kids with type 1 diabetes.”

“This study suggests that bone-loading physical activity can substantially improve skeletal health in children with [type 1 diabetes] and should provide hope for patients and their families that they can take some action to prevent or mitigate the effects of diabetes on bone,” coauthor and incoming ASBMR President Mary L. Bouxsein, PhD, told this news organization in an email.

“We interpret these data as an important reason to advocate for increased time in moderate to vigorous bone-loading activity,” said Dr. Bouxsein, professor, department of orthopedic surgery, Harvard Medical School, Boston, “though the ‘dose’ in terms of hours per day or episodes per week to promote optimal bone health is still to be determined.”
 

“Ongoing debate,” “need stronger proof”

Asked for comment, Laura K. Bachrach, MD, who was not involved with the research, noted: “Activity benefits the development of bone strength through effects on bone geometry more than ‘density,’ and conversely, lack of physical activity can compromise gains in cortical bone diameter and thickness.”

However, “there is ongoing debate about the impact of type 1 diabetes on bone health and the factor(s) determining risk,” Dr. Bachrach, a pediatric endocrinologist at Stanford Children’s Health, Palo Alto, Calif., told this news organization in an email.  

The current findings suggest “that physical activity in adolescent girls provided protection against potential adverse effects of type 1 diabetes,” said Dr. Bachrach, who spoke about bone fragility in childhood in a video commentary in 2021.

Study strengths, she noted, “include the rigor and expertise of the investigators, use of multiple surrogate measures that capture bone geometry/microarchitecture, as well as the inclusion of healthy local controls.”  

“The study is limited by the cross-sectional design and subjects who opted, or not, to be active,” she added. “Stronger proof of the protective effects of activity on bone health in type 1 diabetes would require a randomized longitudinal intervention study, as alluded to by the authors of the study.”
 

Hypothesis: Those with type 1 diabetes acquire less bone mass in early 20s

The excess fracture risk in children with type 1 diabetes has been previously reported and is 14%-35% higher than the fracture risk in children without diabetes, Dr. Bouxsein explained. And “between 30% to 50% of kids [with type 1 diabetes] will have a fracture before the age of 18, so the excess fracture risk in diabetes is not clinically obvious,” she added.

However, “several lines of evidence strongly suggest that bone mass and microarchitecture at the time of peak bone mass (early 20s) is a major determinant of fracture risk throughout the lifespan,” she noted.

“Our hypothesis,” Dr. Bouxsein said, “is that the metabolic disruptions of diabetes, when they are present during the acquisition of peak bone mass, interfere with optimal bone development, and therefore may contribute to increased fracture risk later in life.”

Dr. Bachrach agreed that “peak bone strength is achieved by early adulthood, making childhood and adolescence important times to optimize bone health,” and that “peak bone strength is a predictor of lifetime risk of osteoporosis.”

“The diagnosis of pediatric osteoporosis is made when a child or teen sustains a vertebral fracture or femur fracture with minimal or no trauma,” she explained. “The diagnosis can also be made in a pediatric patient with low BMD [bone mineral density] for age in combination with a history of several long-bone fractures.”

Dr. Mitchell noted that type 1 diabetes is associated with a higher risk of fractures, which is sixfold in adults. In another study, she said, the group showed that in 10- to 16-year-old girls who’ve only had diabetes for a few years, “trabecular bone density is lower, they have lower estimated failure load, and longitudinally when we follow them, at least at the radius, we’re seeing bone loss at a relatively young age when we wouldn’t be expecting to see bone loss.”
 

80 girls enrolled, half had type 1 diabetes

Researchers enrolled 36 girls with type 1 diabetes and 44 girls without type 1 diabetes (controls) who were a mean age of 14.7 years and most (92%) were White. The girls with and without diabetes had similar rates of previous fractures (44% and 51%).

Those with diabetes had been diagnosed at a mean age of 9 years and had had diabetes for a mean of 4.6 years.

Researchers calculated participants’ total BPAQ scores based on type, duration, and frequency of bone-loading activities. 

Participants had dual-energy X-ray absorptiometry scans to determine areal bone mineral density (BMD) at the total hip, femoral neck, lumbar spine, and whole body less head.

They also had high-resolution peripheral quantitative computed tomography at the distal tibia and radius to determine volumetric BMD, bone microarchitecture, and estimated bone strength (calculated using microfinite element analysis).

The two groups had similar total BPAQ scores (57.3 and 64.6), with a median score of 49.

BPAQ scores were positively associated with areal BMD at all sites (whole body, lumbar spine, total hip, femoral neck, and 1/3 radius) and with trabecular BMD and estimated failure load at the distal radius and tibia (P < .05 for all, adjusted for bone age).

Among participants with low physical activity (BPAQ below the median), compared with controls, those with type 1 diabetes had 6.6% lower aerial BMD at the lumbar spine (0.868 vs. 0.929 g/cm³; P = .04), 8% lower trabecular volumetric BMD at the distal radius (128.5 vs. 156.8 mg/cm³; P = .01), and 12% lower estimated failure load. Results at the distal tibia were similar.
 

Next steps

“More observational studies in males and females across a broader age spectrum would be helpful,” Dr. Bachrach noted. “The ‘gold standard’ model would be a long-term randomized controlled activity intervention study.”

“Further studies are underway [in girls and boys] using objective measures of activity including accelerometry and longitudinal observation to help confirm the findings from the current study,” Dr. Bouxsein said. “Ultimately, trials of activity interventions in children with [type 1 diabetes] will be the gold standard to determine to what extent physical activity can mitigate bone disease in [type 1 diabetes],” she agreed.

The study authors and Dr. Bachrach have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

STOCKHOLM – New evidence continues to show that alternative measures of adiposity than body mass index, such as waist-to-hip ratio, work better for predicting the risk a person with overweight or obesity faces from their excess weight.

A direct comparison of waist-to-hip ratio (WHR), body mass index (BMI), and fat mass index (FMI) in a total of more than 380,000 United Kingdom residents included in the UK Biobank showed that WHR had the strongest and most consistent relationship to all-cause death, compared with the other two measures, indicating that clinicians should pay more attention to adiposity distribution than they do to BMI when prioritizing obesity interventions, Irfan Khan said at the annual meeting of the European Association for the Study of Diabetes.

MDedge News/Mitchel L. Zoler

Moving away from BMI-centric obesity

“This is a timely topic, because guidelines for treating people with obesity have depended so much on BMI. We want to go from a BMI-centric view to a view of obesity that depends more on disease burden,” commented Matthias Blüher, MD, professor of molecular endocrinology and head of the Obesity Outpatient Clinic for Adults at the University of Leipzig (Germany).

MDedge News/Mitchel L. Zoler

For example, the 2016 obesity management guidelines from the American Association of Clinical Endocrinologists and the American College of Endocrinology called for a “complications-centric” approach to assessing and intervening in people with obesity rather than a “BMI-centric” approach.

But Dr. Blüher went a step further in an interview, adding that “waist-to-hip ratio is now outdated,” with adjusted measures of WHR such as waist-to-height ratio “considered a better proxy for all-cause death.” He also gave high marks to the Edmonton Obesity Staging System, which independently added to BMI as well as to a diagnosis of metabolic syndrome for predicting mortality in a sample from the U.S. National Health and Nutrition Examination Survey (NHANES). The Edmonton System also surpassed BMI for disease-severity staging using data from more than 23,000 Canadians with a BMI that denoted obesity.
 

1 standard deviation increase in WHR linked with a 41% increased mortality

The study reported by Mr. Khan used both epidemiologic and Mendelian randomization analyses on data collected from more than 380,000 U.K. residents included in the UK Biobank database to examine the statistical associations between BMI, FMI, and WHR and all-cause death. This showed that while BMI and FMI both had significant, independent associations with all-cause mortality, with hazard ratios of 1.14 for each 1 standard deviation increase in BMI and of 1.17 for each standard deviation increase in FMI, the link was a stronger 1.41 per standard deviation increase in WHR, he said.

Another analysis that divided the entire UK Biobank study cohort into 20 roughly similar subgroups by their BMI showed that WHR had the most consistent association across the BMI spectrum.

Further analyses showed that WHR also strongly and significantly linked with cardiovascular disease death and with other causes of death that were not cardiovascular, cancer-related, or associated with respiratory diseases. And the WHR link to all-cause mortality was strongest in men, and much less robust in women, likely because visceral adiposity is much more common among men, even compared with the postmenopausal women who predominate in the UK Biobank cohort.

One more feature of WHR that makes it an attractive metric is its relative ease of measurement, about as easy as BMI, Mr. Khan said.

The study received no commercial funding, and Mr. Khan had no disclosures. Dr. Blüher has been a consultant to or speaker on behalf of Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Lilly, Novartis, Novo Nordisk, and Sanofi.

[email protected]

STOCKHOLM – New evidence continues to show that alternative measures of adiposity than body mass index, such as waist-to-hip ratio, work better for predicting the risk a person with overweight or obesity faces from their excess weight.

A direct comparison of waist-to-hip ratio (WHR), body mass index (BMI), and fat mass index (FMI) in a total of more than 380,000 United Kingdom residents included in the UK Biobank showed that WHR had the strongest and most consistent relationship to all-cause death, compared with the other two measures, indicating that clinicians should pay more attention to adiposity distribution than they do to BMI when prioritizing obesity interventions, Irfan Khan said at the annual meeting of the European Association for the Study of Diabetes.

MDedge News/Mitchel L. Zoler

Moving away from BMI-centric obesity

“This is a timely topic, because guidelines for treating people with obesity have depended so much on BMI. We want to go from a BMI-centric view to a view of obesity that depends more on disease burden,” commented Matthias Blüher, MD, professor of molecular endocrinology and head of the Obesity Outpatient Clinic for Adults at the University of Leipzig (Germany).

MDedge News/Mitchel L. Zoler

For example, the 2016 obesity management guidelines from the American Association of Clinical Endocrinologists and the American College of Endocrinology called for a “complications-centric” approach to assessing and intervening in people with obesity rather than a “BMI-centric” approach.

But Dr. Blüher went a step further in an interview, adding that “waist-to-hip ratio is now outdated,” with adjusted measures of WHR such as waist-to-height ratio “considered a better proxy for all-cause death.” He also gave high marks to the Edmonton Obesity Staging System, which independently added to BMI as well as to a diagnosis of metabolic syndrome for predicting mortality in a sample from the U.S. National Health and Nutrition Examination Survey (NHANES). The Edmonton System also surpassed BMI for disease-severity staging using data from more than 23,000 Canadians with a BMI that denoted obesity.
 

1 standard deviation increase in WHR linked with a 41% increased mortality

The study reported by Mr. Khan used both epidemiologic and Mendelian randomization analyses on data collected from more than 380,000 U.K. residents included in the UK Biobank database to examine the statistical associations between BMI, FMI, and WHR and all-cause death. This showed that while BMI and FMI both had significant, independent associations with all-cause mortality, with hazard ratios of 1.14 for each 1 standard deviation increase in BMI and of 1.17 for each standard deviation increase in FMI, the link was a stronger 1.41 per standard deviation increase in WHR, he said.

Another analysis that divided the entire UK Biobank study cohort into 20 roughly similar subgroups by their BMI showed that WHR had the most consistent association across the BMI spectrum.

Further analyses showed that WHR also strongly and significantly linked with cardiovascular disease death and with other causes of death that were not cardiovascular, cancer-related, or associated with respiratory diseases. And the WHR link to all-cause mortality was strongest in men, and much less robust in women, likely because visceral adiposity is much more common among men, even compared with the postmenopausal women who predominate in the UK Biobank cohort.

One more feature of WHR that makes it an attractive metric is its relative ease of measurement, about as easy as BMI, Mr. Khan said.

The study received no commercial funding, and Mr. Khan had no disclosures. Dr. Blüher has been a consultant to or speaker on behalf of Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Lilly, Novartis, Novo Nordisk, and Sanofi.

[email protected]

STOCKHOLM – New evidence continues to show that alternative measures of adiposity than body mass index, such as waist-to-hip ratio, work better for predicting the risk a person with overweight or obesity faces from their excess weight.

A direct comparison of waist-to-hip ratio (WHR), body mass index (BMI), and fat mass index (FMI) in a total of more than 380,000 United Kingdom residents included in the UK Biobank showed that WHR had the strongest and most consistent relationship to all-cause death, compared with the other two measures, indicating that clinicians should pay more attention to adiposity distribution than they do to BMI when prioritizing obesity interventions, Irfan Khan said at the annual meeting of the European Association for the Study of Diabetes.

MDedge News/Mitchel L. Zoler

Moving away from BMI-centric obesity

“This is a timely topic, because guidelines for treating people with obesity have depended so much on BMI. We want to go from a BMI-centric view to a view of obesity that depends more on disease burden,” commented Matthias Blüher, MD, professor of molecular endocrinology and head of the Obesity Outpatient Clinic for Adults at the University of Leipzig (Germany).

MDedge News/Mitchel L. Zoler

For example, the 2016 obesity management guidelines from the American Association of Clinical Endocrinologists and the American College of Endocrinology called for a “complications-centric” approach to assessing and intervening in people with obesity rather than a “BMI-centric” approach.

But Dr. Blüher went a step further in an interview, adding that “waist-to-hip ratio is now outdated,” with adjusted measures of WHR such as waist-to-height ratio “considered a better proxy for all-cause death.” He also gave high marks to the Edmonton Obesity Staging System, which independently added to BMI as well as to a diagnosis of metabolic syndrome for predicting mortality in a sample from the U.S. National Health and Nutrition Examination Survey (NHANES). The Edmonton System also surpassed BMI for disease-severity staging using data from more than 23,000 Canadians with a BMI that denoted obesity.
 

1 standard deviation increase in WHR linked with a 41% increased mortality

The study reported by Mr. Khan used both epidemiologic and Mendelian randomization analyses on data collected from more than 380,000 U.K. residents included in the UK Biobank database to examine the statistical associations between BMI, FMI, and WHR and all-cause death. This showed that while BMI and FMI both had significant, independent associations with all-cause mortality, with hazard ratios of 1.14 for each 1 standard deviation increase in BMI and of 1.17 for each standard deviation increase in FMI, the link was a stronger 1.41 per standard deviation increase in WHR, he said.

Another analysis that divided the entire UK Biobank study cohort into 20 roughly similar subgroups by their BMI showed that WHR had the most consistent association across the BMI spectrum.

Further analyses showed that WHR also strongly and significantly linked with cardiovascular disease death and with other causes of death that were not cardiovascular, cancer-related, or associated with respiratory diseases. And the WHR link to all-cause mortality was strongest in men, and much less robust in women, likely because visceral adiposity is much more common among men, even compared with the postmenopausal women who predominate in the UK Biobank cohort.

One more feature of WHR that makes it an attractive metric is its relative ease of measurement, about as easy as BMI, Mr. Khan said.

The study received no commercial funding, and Mr. Khan had no disclosures. Dr. Blüher has been a consultant to or speaker on behalf of Amgen, AstraZeneca, Bayer, Boehringer Ingelheim, Lilly, Novartis, Novo Nordisk, and Sanofi.

[email protected]

Omega-3 supplements did not reduce fractures during a median 5.3-year follow-up in the more than 25,000 generally healthy men and women (≥ age 50 and ≥ age 55, respectively) in the Vitamin D and Omega-3 Trial (VITAL).

The large randomized controlled trial tested whether omega-3 fatty acid or vitamin D supplements prevented cardiovascular disease or cancer in a representative sample of midlife and older adults from 50 U.S. states – which they did not. In a further analysis of VITAL, vitamin D supplements (cholecalciferol, 2,000 IU/day) did not lower the risk of incident total, nonvertebral, and hip fractures, compared with placebo.

Dmitriy Danilchenko/Shutterstock

Now this new analysis shows that omega-3 fatty acid supplements (1 g/day of fish oil) did not reduce the risk of such fractures in the VITAL population either. Meryl S. LeBoff, MD, presented the latest findings during an oral session at the annual meeting of the American Society for Bone and Mineral Research.

“In this, the largest randomized controlled trial in the world, we did not find an effect of omega-3 fatty acid supplements on fractures,” Dr. LeBoff, from Brigham and Women’s Hospital and Harvard Medical School, both in Boston, told this news organization.

The current analysis did “unexpectedly” show that among participants who received the omega-3 fatty acid supplements, there was an increase in fractures in men, and fracture risk was higher in people with a normal or low body mass index and lower in people with higher BMI.

However, these subgroup findings need to be interpreted with caution and may be caused by chance, Dr. LeBoff warned. The researchers will be investigating these findings in further analyses.
 

Should patients take omega-3 supplements or not?

Asked whether, in the meantime, patients should start or keep taking fish oil supplements for possible health benefits, she noted that certain individuals might benefit.

For example, in VITAL, participants who ate less than 1.5 servings of fish per week and received omega-3 fatty acid supplements had a decrease in the combined cardiovascular endpoint, and Black participants who took fish oil supplements had a substantially reduced risk of the outcome, regardless of fish intake.

“I think everybody needs to review [the study findings] with clinicians and make a decision in terms of what would be best for them,” she said.

Session comoderator Bente Langdahl, MD, PhD, commented that “many people take omega-3 because they think it will help” knee, hip, or other joint pain.

Perhaps men are more prone to joint pain because of osteoarthritis and the supplements lessen the pain, so these men became more physically active and more prone to fractures, she speculated.

The current study shows that, “so far, we haven’t been able to demonstrate a reduced rate of fractures with fish oil supplements in clinical randomized trials” conducted in relatively healthy and not the oldest patients, she summarized. “We’re not talking about 80-year-olds.”

In this “well-conducted study, they were not able to see any difference” with omega-3 fatty acid supplements versus placebo, but apparently, there are no harms associated with taking these supplements, she said.

To patients who ask her about such supplements, Dr. Langdahl advised: “Try it out for 3 months. If it really helps you, if it takes away your joint pain or whatever, then that might work for you. But then remember to stop again because it might just be a temporary effect.”
 

Could fish oil supplements protect against fractures?

An estimated 22% of U.S. adults aged 60 and older take omega-3 fatty acid supplements, Dr. LeBoff noted.

Preclinical studies have shown that omega-3 fatty acids reduce bone resorption and have anti-inflammatory effects, but observational studies have reported conflicting findings.

The researchers conducted this ancillary study of VITAL to fill these knowledge gaps.

VITAL enrolled a national sample of 25,871 U.S. men and women, including 5,106 Black participants, with a mean age of 67 and a mean BMI of 28 kg/m2.

Importantly, participants were not recruited by low bone density, fractures, or vitamin D deficiency. Prior to entry, participants were required to stop taking omega-3 supplements and limit nonstudy vitamin D and calcium supplements.

The omega-3 fatty acid supplements used in the study contained eicosapentaenoic acid and docosahexaenoic acid in a 1.2:1 ratio.

VITAL had a 2x2 factorial design whereby 6,463 participants were randomized to receive the omega-3 fatty acid supplement and 6,474 were randomized to placebo. (Remaining participants were randomized to receive vitamin D or placebo.)

Participants in the omega-3 fatty acid and placebo groups had similar baseline characteristics. For example, about half (50.5%) were women, and on average, they ate 1.1 servings of dark-meat fish (such as salmon) per week.

Participants completed detailed questionnaires at baseline and each year.

Plasma omega-3 levels were measured at baseline and, in 1,583 participants, at 1 year of follow-up. The mean omega-3 index rose 54.7% in the omega-3 fatty acid group and changed less than 2% in the placebo group at 1 year.

Study pill adherence was 87.0% at 2 years and 85.7% at 5 years.

Fractures were self-reported on annual questionnaires and centrally adjudicated in medical record review.
 

No clinically meaningful effect of omega-3 fatty acids on fractures

During a median 5.3-year follow-up, researchers adjudicated 2,133 total fractures and confirmed 1,991 fractures (93%) in 1551 participants.

Incidences of total, nonvertebral, and hip fractures were similar in both groups.

Compared with placebo, omega-3 fatty acid supplements had no significant effect on risk of total fractures (hazard ratio, 1.02; 95% confidence interval, 0.92-1.13), nonvertebral fractures (HR, 1.01; 95% CI, 0.91-1.12), or hip fractures (HR, 0.89; 95% CI, 0.61-1.30), all adjusted for age, sex, and race.

The “confidence intervals were narrow, likely excluding a clinically meaningful effect,” Dr. LeBoff noted.

Among men, those who received fish oil supplements had a greater risk of fracture than those who received placebo (HR, 1.27; 95% CI, 1.07-1.51), but this result “was not corrected for multiple hypothesis testing,” Dr. LeBoff cautioned.

In the overall population, participants with a BMI less than 25 who received fish oil versus placebo had an increased risk of fracture, and those with a BMI of at least 30 who received fish oil versus placebo had a decreased risk of fracture, but the limits of the confidence intervals crossed 1.00.

After excluding digit, skull, and pathologic fractures, there was no significant reduction in total fractures (HR, 1.02; 95% CI, 0.92-1.14), nonvertebral fractures (HR, 1.02; 95% CI, 0.92-1.14), or hip fractures (HR, 0.90; 95% CI, 0.61-1.33), with omega-3 supplements versus placebo.

Similarly, there was no significant reduction in risk of major osteoporotic fractures (hip, wrist, humerus, and clinical spine fractures) or wrist fractures with omega-3 supplements versus placebo.

VITAL only studied one dose of omega-3 fatty acid supplements, and results may not be generalizable to younger adults, or older adults living in residential communities, Dr. LeBoff noted.

The study was supported by grants from the National Institute of Arthritis Musculoskeletal and Skin Diseases. VITAL was funded by the National Cancer Institute and the National Heart, Lung, and Blood Institute. Dr. LeBoff and Dr. Langdahl have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Omega-3 supplements did not reduce fractures during a median 5.3-year follow-up in the more than 25,000 generally healthy men and women (≥ age 50 and ≥ age 55, respectively) in the Vitamin D and Omega-3 Trial (VITAL).

The large randomized controlled trial tested whether omega-3 fatty acid or vitamin D supplements prevented cardiovascular disease or cancer in a representative sample of midlife and older adults from 50 U.S. states – which they did not. In a further analysis of VITAL, vitamin D supplements (cholecalciferol, 2,000 IU/day) did not lower the risk of incident total, nonvertebral, and hip fractures, compared with placebo.

Dmitriy Danilchenko/Shutterstock

Now this new analysis shows that omega-3 fatty acid supplements (1 g/day of fish oil) did not reduce the risk of such fractures in the VITAL population either. Meryl S. LeBoff, MD, presented the latest findings during an oral session at the annual meeting of the American Society for Bone and Mineral Research.

“In this, the largest randomized controlled trial in the world, we did not find an effect of omega-3 fatty acid supplements on fractures,” Dr. LeBoff, from Brigham and Women’s Hospital and Harvard Medical School, both in Boston, told this news organization.

The current analysis did “unexpectedly” show that among participants who received the omega-3 fatty acid supplements, there was an increase in fractures in men, and fracture risk was higher in people with a normal or low body mass index and lower in people with higher BMI.

However, these subgroup findings need to be interpreted with caution and may be caused by chance, Dr. LeBoff warned. The researchers will be investigating these findings in further analyses.
 

Should patients take omega-3 supplements or not?

Asked whether, in the meantime, patients should start or keep taking fish oil supplements for possible health benefits, she noted that certain individuals might benefit.

For example, in VITAL, participants who ate less than 1.5 servings of fish per week and received omega-3 fatty acid supplements had a decrease in the combined cardiovascular endpoint, and Black participants who took fish oil supplements had a substantially reduced risk of the outcome, regardless of fish intake.

“I think everybody needs to review [the study findings] with clinicians and make a decision in terms of what would be best for them,” she said.

Session comoderator Bente Langdahl, MD, PhD, commented that “many people take omega-3 because they think it will help” knee, hip, or other joint pain.

Perhaps men are more prone to joint pain because of osteoarthritis and the supplements lessen the pain, so these men became more physically active and more prone to fractures, she speculated.

The current study shows that, “so far, we haven’t been able to demonstrate a reduced rate of fractures with fish oil supplements in clinical randomized trials” conducted in relatively healthy and not the oldest patients, she summarized. “We’re not talking about 80-year-olds.”

In this “well-conducted study, they were not able to see any difference” with omega-3 fatty acid supplements versus placebo, but apparently, there are no harms associated with taking these supplements, she said.

To patients who ask her about such supplements, Dr. Langdahl advised: “Try it out for 3 months. If it really helps you, if it takes away your joint pain or whatever, then that might work for you. But then remember to stop again because it might just be a temporary effect.”
 

Could fish oil supplements protect against fractures?

An estimated 22% of U.S. adults aged 60 and older take omega-3 fatty acid supplements, Dr. LeBoff noted.

Preclinical studies have shown that omega-3 fatty acids reduce bone resorption and have anti-inflammatory effects, but observational studies have reported conflicting findings.

The researchers conducted this ancillary study of VITAL to fill these knowledge gaps.

VITAL enrolled a national sample of 25,871 U.S. men and women, including 5,106 Black participants, with a mean age of 67 and a mean BMI of 28 kg/m2.

Importantly, participants were not recruited by low bone density, fractures, or vitamin D deficiency. Prior to entry, participants were required to stop taking omega-3 supplements and limit nonstudy vitamin D and calcium supplements.

The omega-3 fatty acid supplements used in the study contained eicosapentaenoic acid and docosahexaenoic acid in a 1.2:1 ratio.

VITAL had a 2x2 factorial design whereby 6,463 participants were randomized to receive the omega-3 fatty acid supplement and 6,474 were randomized to placebo. (Remaining participants were randomized to receive vitamin D or placebo.)

Participants in the omega-3 fatty acid and placebo groups had similar baseline characteristics. For example, about half (50.5%) were women, and on average, they ate 1.1 servings of dark-meat fish (such as salmon) per week.

Participants completed detailed questionnaires at baseline and each year.

Plasma omega-3 levels were measured at baseline and, in 1,583 participants, at 1 year of follow-up. The mean omega-3 index rose 54.7% in the omega-3 fatty acid group and changed less than 2% in the placebo group at 1 year.

Study pill adherence was 87.0% at 2 years and 85.7% at 5 years.

Fractures were self-reported on annual questionnaires and centrally adjudicated in medical record review.
 

No clinically meaningful effect of omega-3 fatty acids on fractures

During a median 5.3-year follow-up, researchers adjudicated 2,133 total fractures and confirmed 1,991 fractures (93%) in 1551 participants.

Incidences of total, nonvertebral, and hip fractures were similar in both groups.

Compared with placebo, omega-3 fatty acid supplements had no significant effect on risk of total fractures (hazard ratio, 1.02; 95% confidence interval, 0.92-1.13), nonvertebral fractures (HR, 1.01; 95% CI, 0.91-1.12), or hip fractures (HR, 0.89; 95% CI, 0.61-1.30), all adjusted for age, sex, and race.

The “confidence intervals were narrow, likely excluding a clinically meaningful effect,” Dr. LeBoff noted.

Among men, those who received fish oil supplements had a greater risk of fracture than those who received placebo (HR, 1.27; 95% CI, 1.07-1.51), but this result “was not corrected for multiple hypothesis testing,” Dr. LeBoff cautioned.

In the overall population, participants with a BMI less than 25 who received fish oil versus placebo had an increased risk of fracture, and those with a BMI of at least 30 who received fish oil versus placebo had a decreased risk of fracture, but the limits of the confidence intervals crossed 1.00.

After excluding digit, skull, and pathologic fractures, there was no significant reduction in total fractures (HR, 1.02; 95% CI, 0.92-1.14), nonvertebral fractures (HR, 1.02; 95% CI, 0.92-1.14), or hip fractures (HR, 0.90; 95% CI, 0.61-1.33), with omega-3 supplements versus placebo.

Similarly, there was no significant reduction in risk of major osteoporotic fractures (hip, wrist, humerus, and clinical spine fractures) or wrist fractures with omega-3 supplements versus placebo.

VITAL only studied one dose of omega-3 fatty acid supplements, and results may not be generalizable to younger adults, or older adults living in residential communities, Dr. LeBoff noted.

The study was supported by grants from the National Institute of Arthritis Musculoskeletal and Skin Diseases. VITAL was funded by the National Cancer Institute and the National Heart, Lung, and Blood Institute. Dr. LeBoff and Dr. Langdahl have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.

Omega-3 supplements did not reduce fractures during a median 5.3-year follow-up in the more than 25,000 generally healthy men and women (≥ age 50 and ≥ age 55, respectively) in the Vitamin D and Omega-3 Trial (VITAL).

The large randomized controlled trial tested whether omega-3 fatty acid or vitamin D supplements prevented cardiovascular disease or cancer in a representative sample of midlife and older adults from 50 U.S. states – which they did not. In a further analysis of VITAL, vitamin D supplements (cholecalciferol, 2,000 IU/day) did not lower the risk of incident total, nonvertebral, and hip fractures, compared with placebo.

Dmitriy Danilchenko/Shutterstock

Now this new analysis shows that omega-3 fatty acid supplements (1 g/day of fish oil) did not reduce the risk of such fractures in the VITAL population either. Meryl S. LeBoff, MD, presented the latest findings during an oral session at the annual meeting of the American Society for Bone and Mineral Research.

“In this, the largest randomized controlled trial in the world, we did not find an effect of omega-3 fatty acid supplements on fractures,” Dr. LeBoff, from Brigham and Women’s Hospital and Harvard Medical School, both in Boston, told this news organization.

The current analysis did “unexpectedly” show that among participants who received the omega-3 fatty acid supplements, there was an increase in fractures in men, and fracture risk was higher in people with a normal or low body mass index and lower in people with higher BMI.

However, these subgroup findings need to be interpreted with caution and may be caused by chance, Dr. LeBoff warned. The researchers will be investigating these findings in further analyses.
 

Should patients take omega-3 supplements or not?

Asked whether, in the meantime, patients should start or keep taking fish oil supplements for possible health benefits, she noted that certain individuals might benefit.

For example, in VITAL, participants who ate less than 1.5 servings of fish per week and received omega-3 fatty acid supplements had a decrease in the combined cardiovascular endpoint, and Black participants who took fish oil supplements had a substantially reduced risk of the outcome, regardless of fish intake.

“I think everybody needs to review [the study findings] with clinicians and make a decision in terms of what would be best for them,” she said.

Session comoderator Bente Langdahl, MD, PhD, commented that “many people take omega-3 because they think it will help” knee, hip, or other joint pain.

Perhaps men are more prone to joint pain because of osteoarthritis and the supplements lessen the pain, so these men became more physically active and more prone to fractures, she speculated.

The current study shows that, “so far, we haven’t been able to demonstrate a reduced rate of fractures with fish oil supplements in clinical randomized trials” conducted in relatively healthy and not the oldest patients, she summarized. “We’re not talking about 80-year-olds.”

In this “well-conducted study, they were not able to see any difference” with omega-3 fatty acid supplements versus placebo, but apparently, there are no harms associated with taking these supplements, she said.

To patients who ask her about such supplements, Dr. Langdahl advised: “Try it out for 3 months. If it really helps you, if it takes away your joint pain or whatever, then that might work for you. But then remember to stop again because it might just be a temporary effect.”
 

Could fish oil supplements protect against fractures?

An estimated 22% of U.S. adults aged 60 and older take omega-3 fatty acid supplements, Dr. LeBoff noted.

Preclinical studies have shown that omega-3 fatty acids reduce bone resorption and have anti-inflammatory effects, but observational studies have reported conflicting findings.

The researchers conducted this ancillary study of VITAL to fill these knowledge gaps.

VITAL enrolled a national sample of 25,871 U.S. men and women, including 5,106 Black participants, with a mean age of 67 and a mean BMI of 28 kg/m2.

Importantly, participants were not recruited by low bone density, fractures, or vitamin D deficiency. Prior to entry, participants were required to stop taking omega-3 supplements and limit nonstudy vitamin D and calcium supplements.

The omega-3 fatty acid supplements used in the study contained eicosapentaenoic acid and docosahexaenoic acid in a 1.2:1 ratio.

VITAL had a 2x2 factorial design whereby 6,463 participants were randomized to receive the omega-3 fatty acid supplement and 6,474 were randomized to placebo. (Remaining participants were randomized to receive vitamin D or placebo.)

Participants in the omega-3 fatty acid and placebo groups had similar baseline characteristics. For example, about half (50.5%) were women, and on average, they ate 1.1 servings of dark-meat fish (such as salmon) per week.

Participants completed detailed questionnaires at baseline and each year.

Plasma omega-3 levels were measured at baseline and, in 1,583 participants, at 1 year of follow-up. The mean omega-3 index rose 54.7% in the omega-3 fatty acid group and changed less than 2% in the placebo group at 1 year.

Study pill adherence was 87.0% at 2 years and 85.7% at 5 years.

Fractures were self-reported on annual questionnaires and centrally adjudicated in medical record review.
 

No clinically meaningful effect of omega-3 fatty acids on fractures

During a median 5.3-year follow-up, researchers adjudicated 2,133 total fractures and confirmed 1,991 fractures (93%) in 1551 participants.

Incidences of total, nonvertebral, and hip fractures were similar in both groups.

Compared with placebo, omega-3 fatty acid supplements had no significant effect on risk of total fractures (hazard ratio, 1.02; 95% confidence interval, 0.92-1.13), nonvertebral fractures (HR, 1.01; 95% CI, 0.91-1.12), or hip fractures (HR, 0.89; 95% CI, 0.61-1.30), all adjusted for age, sex, and race.

The “confidence intervals were narrow, likely excluding a clinically meaningful effect,” Dr. LeBoff noted.

Among men, those who received fish oil supplements had a greater risk of fracture than those who received placebo (HR, 1.27; 95% CI, 1.07-1.51), but this result “was not corrected for multiple hypothesis testing,” Dr. LeBoff cautioned.

In the overall population, participants with a BMI less than 25 who received fish oil versus placebo had an increased risk of fracture, and those with a BMI of at least 30 who received fish oil versus placebo had a decreased risk of fracture, but the limits of the confidence intervals crossed 1.00.

After excluding digit, skull, and pathologic fractures, there was no significant reduction in total fractures (HR, 1.02; 95% CI, 0.92-1.14), nonvertebral fractures (HR, 1.02; 95% CI, 0.92-1.14), or hip fractures (HR, 0.90; 95% CI, 0.61-1.33), with omega-3 supplements versus placebo.

Similarly, there was no significant reduction in risk of major osteoporotic fractures (hip, wrist, humerus, and clinical spine fractures) or wrist fractures with omega-3 supplements versus placebo.

VITAL only studied one dose of omega-3 fatty acid supplements, and results may not be generalizable to younger adults, or older adults living in residential communities, Dr. LeBoff noted.

The study was supported by grants from the National Institute of Arthritis Musculoskeletal and Skin Diseases. VITAL was funded by the National Cancer Institute and the National Heart, Lung, and Blood Institute. Dr. LeBoff and Dr. Langdahl have reported no relevant financial relationships.

A version of this article first appeared on Medscape.com.