“Adipose tissue is an underappreciated and misunderstood organ.” It’s with these words that Aaron M. Cypess, MD, PhD, begins his recent review published in the New England Journal of Medicine.

As obesity rates steadily rise, “the riskiest approach to human adipose tissue is to dismiss its importance,” he adds, especially because there has been “an explosive growth” in our understanding of white and brown adipose tissue over the past 5 to 10 years.

This news organization asked Dr. Cypess, a National Institutes of Health (NIH) scientist whose research focuses on brown fat, to discuss some of the main points in his review, titled, “Reassessing Human Adipose Tissue,” and clear up some misconceptions about fat.

You write that, for people who struggle to lose weight, “fat is often a source of misery, not marvel.” Why is fat a marvel?

When I started medical school in 1992, fat was just a thing that stored calories. You had to get it out of the way when you operated on the stomach or intestines. Now we know it’s not just one cell, it’s multiple types of cells, including immune cells and some blood cells. There’s cell turnover, and cells can get bigger or smaller, so it’s a dynamic tissue. It impacts the immune system and affects insulin sensitivity.

Why use the term “adipose tissue” and not just “fat”?

People think of fat cells and that’s it. However, adipose tissue (fat) has multiple cell types, and they each matter. There are adipocytes (fat cells) – which can be white, brown, beige, or pink – as well as immune cells, fibroblasts, blood vessels, and parts of nerve cells.

The main function of white adipose tissue is to store energy in the form of triglycerides. Brown adipose tissue consumes glucose and triglycerides, generating heat. Brown fat cells within depots of white fat are termed brite cells (a portmanteau of brown and white) or beige cells. Pink fat cells have been found in breast tissue in mice.

What do we now know about white fat and brown fat? Can brown fat change to white fat or vice versa?

White adipose tissue is commonly separated into visceral fat and subcutaneous fat, which have negative and neutral or positive metabolic effects, respectively. It is capable of more than doubling in mass and then returning to baseline.

White adipocyte-derived hormones include leptin, which is low in starvation, and adiponectin, which regulates glucose and lipid metabolism. White adipose tissue is essential for the proper function of the reproductive system, including secretion of hormones and lactation.

Brown adipose tissue protects newborns from cold as they develop the ability to shiver, and in adults it is found in depots in the neck, shoulders, posterior thorax, and abdomen. The amount of brown adipose tissue varies according to sex and lowers with increasing age and increasing body mass index.

There is much more white fat in the body than brown fat. It appears that activating brown fat leads to beneficial effects on metabolism, though we don’t know yet all the steps for how that happens.

In mice, you’ve got white fat depots and brown fat depots, and some brown fat can be found in the white fat.

With humans it’s much more complicated, and I’ve seen this in the operating room myself, and on slides. Where you find brown fat cells you also find a certain proportion of white fat cells, not an exclusive brown fat depot like you see in a mouse.

It is hotly debated right now whether brown fat can change to white fat and vice versa (transdifferentiation). The beige fat cells are supposed to be the kind that can shuttle between more white-like or brown-like. They can sometimes be white or sometimes brown. It can be very contentious in [scientific] papers and meetings.

Are humans born with all the fat cells they will ever have?

No. New fat cells are made throughout our lives. When the white adipocytes store too much triglyceride, they get really big and they get “sick” and die faster. It’s the rate at which the white cells take up the fat to store it and then get rid of it that can impact whether someone gains a lot of weight and whether they can successfully lose it after reasonable effort.

The average lifespan of a white fat cell is 15 years. We have no idea yet of the lifespan of a brown fat cell.

Is there a single “fat gene”? What role do fat genes play in the likelihood of developing metabolic diseases and type 2 diabetes?

Genes are very important for influencing the development of obesity and probably influence 50%-70% of obesity, based on studies in populations of predominantly European origin. But that high percentage reflects the impact of hundreds of genes. For most people, there is no one gene that exerts all of the effects. There are extremely rare diseases where one gene is responsible. Currently, only 20% of the entire phenotypic variation in obesity can be explained by the thousands of loci identified so far.

Why is it “correct but too simplistic” to attribute the increasing rates of obesity to excessive triglyceride storage in white adipose tissue?

Saying obesity is caused by too much triglyceride storage ignores the reasons how and why the triglycerides got there. There are likely to be multiple contributing factors to drive obesity, and those have billions of dollars of policy implications. Is obesity resulting from portion sizes? Then we should work on educating the public on how to estimate their caloric intake. Is it the types of foods, such as ultra-processed foods? Then we can discourage eating certain food groups while promoting others. Is it about physical activity? Then we should prioritize exercise programs.

Why is obesity “not simply a failure of will power”?

Genetic factors in adipose tissue impact how easy it is to store triglycerides, how easy it is to get fat out of the tissue and burn it up, and what kinds of hormones are released by the tissue to regulate appetite, insulin resistance, and inflammation. Ten different people can all overeat the same amount of the same foods, yet there will be differences in the amount of weight gain and metabolic complications experienced. And at the brain level, some people will feel “full” sooner than others.

How can excess adipose tissue lead to disease? Do some people have “metabolically healthy obesity”?

Excess adipose tissue leads to chronic inflammation that can then cause insulin resistance, hypertension, fatty liver disease, and other complications. It appears that there are metabolically healthy obese people, but it is not clear if that is only a temporary state.

Could long-term brown adipose tissue activation help treat obesity or related metabolic disease?

Our research group at the NIH and others have shown that long-term brown adipose tissue activation produces metabolic benefit such as improved insulin resistance, lower plasma glucose, and higher HDL [good] cholesterol. However, there is no evidence yet that it will lead to actual weight loss.

We are trying to use brown adipose tissue activation to treat obesity-related metabolic disease to see if it could lead to reduction in inflammation, improvement in the cholesterol profile, and decrease in blood pressure.

A large observational study published Jan. 4, 2021, in Nature Medicine by Paul Cohen’s group at Rockefeller University, in tens of thousands of people at Memorial Sloan Kettering Cancer Center, showed that people who had brown fat were generally healthier and had less high blood pressure and less cardiovascular disease. This study could not show causation, but at every BMI, people were healthier if they had more brown fat than if they had less. So, there’s something going on. We’re still trying to figure that out.

Dr. Cypess has no reported no relevant financial relationships.

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

“Adipose tissue is an underappreciated and misunderstood organ.” It’s with these words that Aaron M. Cypess, MD, PhD, begins his recent review published in the New England Journal of Medicine.

As obesity rates steadily rise, “the riskiest approach to human adipose tissue is to dismiss its importance,” he adds, especially because there has been “an explosive growth” in our understanding of white and brown adipose tissue over the past 5 to 10 years.

This news organization asked Dr. Cypess, a National Institutes of Health (NIH) scientist whose research focuses on brown fat, to discuss some of the main points in his review, titled, “Reassessing Human Adipose Tissue,” and clear up some misconceptions about fat.

You write that, for people who struggle to lose weight, “fat is often a source of misery, not marvel.” Why is fat a marvel?

When I started medical school in 1992, fat was just a thing that stored calories. You had to get it out of the way when you operated on the stomach or intestines. Now we know it’s not just one cell, it’s multiple types of cells, including immune cells and some blood cells. There’s cell turnover, and cells can get bigger or smaller, so it’s a dynamic tissue. It impacts the immune system and affects insulin sensitivity.

Why use the term “adipose tissue” and not just “fat”?

People think of fat cells and that’s it. However, adipose tissue (fat) has multiple cell types, and they each matter. There are adipocytes (fat cells) – which can be white, brown, beige, or pink – as well as immune cells, fibroblasts, blood vessels, and parts of nerve cells.

The main function of white adipose tissue is to store energy in the form of triglycerides. Brown adipose tissue consumes glucose and triglycerides, generating heat. Brown fat cells within depots of white fat are termed brite cells (a portmanteau of brown and white) or beige cells. Pink fat cells have been found in breast tissue in mice.

What do we now know about white fat and brown fat? Can brown fat change to white fat or vice versa?

White adipose tissue is commonly separated into visceral fat and subcutaneous fat, which have negative and neutral or positive metabolic effects, respectively. It is capable of more than doubling in mass and then returning to baseline.

White adipocyte-derived hormones include leptin, which is low in starvation, and adiponectin, which regulates glucose and lipid metabolism. White adipose tissue is essential for the proper function of the reproductive system, including secretion of hormones and lactation.

Brown adipose tissue protects newborns from cold as they develop the ability to shiver, and in adults it is found in depots in the neck, shoulders, posterior thorax, and abdomen. The amount of brown adipose tissue varies according to sex and lowers with increasing age and increasing body mass index.

There is much more white fat in the body than brown fat. It appears that activating brown fat leads to beneficial effects on metabolism, though we don’t know yet all the steps for how that happens.

In mice, you’ve got white fat depots and brown fat depots, and some brown fat can be found in the white fat.

With humans it’s much more complicated, and I’ve seen this in the operating room myself, and on slides. Where you find brown fat cells you also find a certain proportion of white fat cells, not an exclusive brown fat depot like you see in a mouse.

It is hotly debated right now whether brown fat can change to white fat and vice versa (transdifferentiation). The beige fat cells are supposed to be the kind that can shuttle between more white-like or brown-like. They can sometimes be white or sometimes brown. It can be very contentious in [scientific] papers and meetings.

Are humans born with all the fat cells they will ever have?

No. New fat cells are made throughout our lives. When the white adipocytes store too much triglyceride, they get really big and they get “sick” and die faster. It’s the rate at which the white cells take up the fat to store it and then get rid of it that can impact whether someone gains a lot of weight and whether they can successfully lose it after reasonable effort.

The average lifespan of a white fat cell is 15 years. We have no idea yet of the lifespan of a brown fat cell.

Is there a single “fat gene”? What role do fat genes play in the likelihood of developing metabolic diseases and type 2 diabetes?

Genes are very important for influencing the development of obesity and probably influence 50%-70% of obesity, based on studies in populations of predominantly European origin. But that high percentage reflects the impact of hundreds of genes. For most people, there is no one gene that exerts all of the effects. There are extremely rare diseases where one gene is responsible. Currently, only 20% of the entire phenotypic variation in obesity can be explained by the thousands of loci identified so far.

Why is it “correct but too simplistic” to attribute the increasing rates of obesity to excessive triglyceride storage in white adipose tissue?

Saying obesity is caused by too much triglyceride storage ignores the reasons how and why the triglycerides got there. There are likely to be multiple contributing factors to drive obesity, and those have billions of dollars of policy implications. Is obesity resulting from portion sizes? Then we should work on educating the public on how to estimate their caloric intake. Is it the types of foods, such as ultra-processed foods? Then we can discourage eating certain food groups while promoting others. Is it about physical activity? Then we should prioritize exercise programs.

Why is obesity “not simply a failure of will power”?

Genetic factors in adipose tissue impact how easy it is to store triglycerides, how easy it is to get fat out of the tissue and burn it up, and what kinds of hormones are released by the tissue to regulate appetite, insulin resistance, and inflammation. Ten different people can all overeat the same amount of the same foods, yet there will be differences in the amount of weight gain and metabolic complications experienced. And at the brain level, some people will feel “full” sooner than others.

How can excess adipose tissue lead to disease? Do some people have “metabolically healthy obesity”?

Excess adipose tissue leads to chronic inflammation that can then cause insulin resistance, hypertension, fatty liver disease, and other complications. It appears that there are metabolically healthy obese people, but it is not clear if that is only a temporary state.

Could long-term brown adipose tissue activation help treat obesity or related metabolic disease?

Our research group at the NIH and others have shown that long-term brown adipose tissue activation produces metabolic benefit such as improved insulin resistance, lower plasma glucose, and higher HDL [good] cholesterol. However, there is no evidence yet that it will lead to actual weight loss.

We are trying to use brown adipose tissue activation to treat obesity-related metabolic disease to see if it could lead to reduction in inflammation, improvement in the cholesterol profile, and decrease in blood pressure.

A large observational study published Jan. 4, 2021, in Nature Medicine by Paul Cohen’s group at Rockefeller University, in tens of thousands of people at Memorial Sloan Kettering Cancer Center, showed that people who had brown fat were generally healthier and had less high blood pressure and less cardiovascular disease. This study could not show causation, but at every BMI, people were healthier if they had more brown fat than if they had less. So, there’s something going on. We’re still trying to figure that out.

Dr. Cypess has no reported no relevant financial relationships.

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

“Adipose tissue is an underappreciated and misunderstood organ.” It’s with these words that Aaron M. Cypess, MD, PhD, begins his recent review published in the New England Journal of Medicine.

As obesity rates steadily rise, “the riskiest approach to human adipose tissue is to dismiss its importance,” he adds, especially because there has been “an explosive growth” in our understanding of white and brown adipose tissue over the past 5 to 10 years.

This news organization asked Dr. Cypess, a National Institutes of Health (NIH) scientist whose research focuses on brown fat, to discuss some of the main points in his review, titled, “Reassessing Human Adipose Tissue,” and clear up some misconceptions about fat.

You write that, for people who struggle to lose weight, “fat is often a source of misery, not marvel.” Why is fat a marvel?

When I started medical school in 1992, fat was just a thing that stored calories. You had to get it out of the way when you operated on the stomach or intestines. Now we know it’s not just one cell, it’s multiple types of cells, including immune cells and some blood cells. There’s cell turnover, and cells can get bigger or smaller, so it’s a dynamic tissue. It impacts the immune system and affects insulin sensitivity.

Why use the term “adipose tissue” and not just “fat”?

People think of fat cells and that’s it. However, adipose tissue (fat) has multiple cell types, and they each matter. There are adipocytes (fat cells) – which can be white, brown, beige, or pink – as well as immune cells, fibroblasts, blood vessels, and parts of nerve cells.

The main function of white adipose tissue is to store energy in the form of triglycerides. Brown adipose tissue consumes glucose and triglycerides, generating heat. Brown fat cells within depots of white fat are termed brite cells (a portmanteau of brown and white) or beige cells. Pink fat cells have been found in breast tissue in mice.

What do we now know about white fat and brown fat? Can brown fat change to white fat or vice versa?

White adipose tissue is commonly separated into visceral fat and subcutaneous fat, which have negative and neutral or positive metabolic effects, respectively. It is capable of more than doubling in mass and then returning to baseline.

White adipocyte-derived hormones include leptin, which is low in starvation, and adiponectin, which regulates glucose and lipid metabolism. White adipose tissue is essential for the proper function of the reproductive system, including secretion of hormones and lactation.

Brown adipose tissue protects newborns from cold as they develop the ability to shiver, and in adults it is found in depots in the neck, shoulders, posterior thorax, and abdomen. The amount of brown adipose tissue varies according to sex and lowers with increasing age and increasing body mass index.

There is much more white fat in the body than brown fat. It appears that activating brown fat leads to beneficial effects on metabolism, though we don’t know yet all the steps for how that happens.

In mice, you’ve got white fat depots and brown fat depots, and some brown fat can be found in the white fat.

With humans it’s much more complicated, and I’ve seen this in the operating room myself, and on slides. Where you find brown fat cells you also find a certain proportion of white fat cells, not an exclusive brown fat depot like you see in a mouse.

It is hotly debated right now whether brown fat can change to white fat and vice versa (transdifferentiation). The beige fat cells are supposed to be the kind that can shuttle between more white-like or brown-like. They can sometimes be white or sometimes brown. It can be very contentious in [scientific] papers and meetings.

Are humans born with all the fat cells they will ever have?

No. New fat cells are made throughout our lives. When the white adipocytes store too much triglyceride, they get really big and they get “sick” and die faster. It’s the rate at which the white cells take up the fat to store it and then get rid of it that can impact whether someone gains a lot of weight and whether they can successfully lose it after reasonable effort.

The average lifespan of a white fat cell is 15 years. We have no idea yet of the lifespan of a brown fat cell.

Is there a single “fat gene”? What role do fat genes play in the likelihood of developing metabolic diseases and type 2 diabetes?

Genes are very important for influencing the development of obesity and probably influence 50%-70% of obesity, based on studies in populations of predominantly European origin. But that high percentage reflects the impact of hundreds of genes. For most people, there is no one gene that exerts all of the effects. There are extremely rare diseases where one gene is responsible. Currently, only 20% of the entire phenotypic variation in obesity can be explained by the thousands of loci identified so far.

Why is it “correct but too simplistic” to attribute the increasing rates of obesity to excessive triglyceride storage in white adipose tissue?

Saying obesity is caused by too much triglyceride storage ignores the reasons how and why the triglycerides got there. There are likely to be multiple contributing factors to drive obesity, and those have billions of dollars of policy implications. Is obesity resulting from portion sizes? Then we should work on educating the public on how to estimate their caloric intake. Is it the types of foods, such as ultra-processed foods? Then we can discourage eating certain food groups while promoting others. Is it about physical activity? Then we should prioritize exercise programs.

Why is obesity “not simply a failure of will power”?

Genetic factors in adipose tissue impact how easy it is to store triglycerides, how easy it is to get fat out of the tissue and burn it up, and what kinds of hormones are released by the tissue to regulate appetite, insulin resistance, and inflammation. Ten different people can all overeat the same amount of the same foods, yet there will be differences in the amount of weight gain and metabolic complications experienced. And at the brain level, some people will feel “full” sooner than others.

How can excess adipose tissue lead to disease? Do some people have “metabolically healthy obesity”?

Excess adipose tissue leads to chronic inflammation that can then cause insulin resistance, hypertension, fatty liver disease, and other complications. It appears that there are metabolically healthy obese people, but it is not clear if that is only a temporary state.

Could long-term brown adipose tissue activation help treat obesity or related metabolic disease?

Our research group at the NIH and others have shown that long-term brown adipose tissue activation produces metabolic benefit such as improved insulin resistance, lower plasma glucose, and higher HDL [good] cholesterol. However, there is no evidence yet that it will lead to actual weight loss.

We are trying to use brown adipose tissue activation to treat obesity-related metabolic disease to see if it could lead to reduction in inflammation, improvement in the cholesterol profile, and decrease in blood pressure.

A large observational study published Jan. 4, 2021, in Nature Medicine by Paul Cohen’s group at Rockefeller University, in tens of thousands of people at Memorial Sloan Kettering Cancer Center, showed that people who had brown fat were generally healthier and had less high blood pressure and less cardiovascular disease. This study could not show causation, but at every BMI, people were healthier if they had more brown fat than if they had less. So, there’s something going on. We’re still trying to figure that out.

Dr. Cypess has no reported no relevant financial relationships.

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

People who don’t get enough sleep during the week may be able to reduce their risk for nonalcoholic fatty liver disease (NAFLD) by catching up on the weekends, researchers say.

“Our study revealed that people who get enough sleep have a lower risk of developing NAFLD than those who get insufficient sleep,” Sangheun Lee, MD, PhD, from Catholic Kwandong University, Incheon, South Korea, and colleagues wrote in Annals of Hepatology.

However, they cautioned that further research is needed to verify their finding.

Previous studies have associated insufficient sleep with obesity, hypertension, diabetes mellitus, and cardiovascular disease, as well as liver fibrosis.

A busy weekday schedule can make it harder to get enough sleep, and some people try to compensate by sleeping longer on weekends. Studies so far have produced mixed findings on this strategy, with some showing that more sleep on the weekend reduces the risk for obesity, hypertension, and metabolic syndrome, and others showing no effect on metabolic dysregulation or energy balance.
 

Accessing a nation’s sleep data

To explore the relationship between sleep patterns and NAFLD, Dr. Lee and colleagues analyzed data from Korea National Health and Nutrition Examination Surveys collected from 2008 to 2019. They excluded people aged less than 20 years, those with hepatitis B or C infections, liver cirrhosis or liver cancer, shift workers and others who “slept irregularly,” and those who consumed alcohol excessively, leaving a cohort of 101,138 participants.

The survey didn’t distinguish between sleep on weekdays and weekends until 2016, so the researchers divided their findings into two: 68,759 people surveyed from 2008 to 2015 (set 1) and 32,379 surveyed from 2016 to 2019 (set 2).

Set 1 was further divided into those who averaged more than 7 hours of sleep per day and those who slept less than that. Set 2 was divided into three groups: one that averaged less than 7 hours of sleep per day and did not catch up on weekends, one that averaged less than 7 hours of sleep per day and did catch up on weekends, and one that averaged more than 7 hours of sleep throughout the week.

The researchers used the hepatic steatosis index (HSI) to determine the presence of a fatty liver, calculated as 8 x (ratio of serum ALT to serum AST) + body mass index (+ 2 for female, + 2 in case of diabetes). An HSI of at least36 was considered an indicator of fatty liver.
 

Less sleep, more risk

Participants in set 1 slept for a mean of 6.8 hours, with 58.6% sleeping more than 7 hours a day. Those in set 2 slept a mean of 6.9 hours during weekdays, with 59.9% sleeping more than 7 hours. They also slept a mean of 7.7 hours on weekends.

In set 1, sleeping at least7 hours was associated with a 16% lower risk for NAFLD (odds ratio, 0.84; 95% confidence interval, 0.79-0.89).

In set 2, sleeping at least 7 hours on weekdays was associated with a 19% reduced risk for NAFLD (OR, 0.81; 95% CI, 0.74-0.89). Sleeping at least 7 hours on the weekend was associated with a 22% reduced risk for NAFLD (OR, 0.78; 95% CI, 0.70-0.87). Compared with those who slept less than 7 hours throughout the week, those who slept less than 7 hours on weekdays and more than 7 hours on weekends had a 20% lower rate of NAFLD (OR, 0.80; 95% CI, 0.70-0.92).

All these associations held true for both men and women.
 

Why getting your Z’s may have hepatic advantages

One explanation for the link between sleep patterns and NAFLD is that dysregulation of cortisol, inflammatory cytokines, and norepinephrine are associated with both variations in sleep and NAFLD onset, Dr. Lee and colleagues wrote.

They also pointed out that a lack of sleep can reduce the secretion of two hormones that promote satiety: leptin and glucagonlike peptide–1. As a result, people who sleep less may eat more and gain weight, which increases the risk for NAFLD.

Ashwani K. Singal, MD, MS, a professor of medicine at the University of South Dakota, Vermillion, who was not involved in the study, noted that it was based on comparing a cross section of a population instead of following the participants over time.

“So, I think it’s an association rather than a cause and effect,” he said in an interview.

The authors don’t report a multivariate analysis to determine whether comorbidities or other characteristics of the patients could explain the association, he pointed out, noting that obesity, for example, can increase the risk for both NAFLD and sleep apnea.

Still, Dr. Singal said, the paper will influence him to mention sleep in the context of lifestyle factors that can affect fatty liver disease. “I’m going to tell my patients, and tell the community physicians to tell their patients, to follow a good sleep hygiene and make sure that they sleep at least 5-7 hours.”

Dr. Singal and the study authors all reported no relevant financial relationships. The study was supported by the National Research Foundation of Korea.

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

People who don’t get enough sleep during the week may be able to reduce their risk for nonalcoholic fatty liver disease (NAFLD) by catching up on the weekends, researchers say.

“Our study revealed that people who get enough sleep have a lower risk of developing NAFLD than those who get insufficient sleep,” Sangheun Lee, MD, PhD, from Catholic Kwandong University, Incheon, South Korea, and colleagues wrote in Annals of Hepatology.

However, they cautioned that further research is needed to verify their finding.

Previous studies have associated insufficient sleep with obesity, hypertension, diabetes mellitus, and cardiovascular disease, as well as liver fibrosis.

A busy weekday schedule can make it harder to get enough sleep, and some people try to compensate by sleeping longer on weekends. Studies so far have produced mixed findings on this strategy, with some showing that more sleep on the weekend reduces the risk for obesity, hypertension, and metabolic syndrome, and others showing no effect on metabolic dysregulation or energy balance.
 

Accessing a nation’s sleep data

To explore the relationship between sleep patterns and NAFLD, Dr. Lee and colleagues analyzed data from Korea National Health and Nutrition Examination Surveys collected from 2008 to 2019. They excluded people aged less than 20 years, those with hepatitis B or C infections, liver cirrhosis or liver cancer, shift workers and others who “slept irregularly,” and those who consumed alcohol excessively, leaving a cohort of 101,138 participants.

The survey didn’t distinguish between sleep on weekdays and weekends until 2016, so the researchers divided their findings into two: 68,759 people surveyed from 2008 to 2015 (set 1) and 32,379 surveyed from 2016 to 2019 (set 2).

Set 1 was further divided into those who averaged more than 7 hours of sleep per day and those who slept less than that. Set 2 was divided into three groups: one that averaged less than 7 hours of sleep per day and did not catch up on weekends, one that averaged less than 7 hours of sleep per day and did catch up on weekends, and one that averaged more than 7 hours of sleep throughout the week.

The researchers used the hepatic steatosis index (HSI) to determine the presence of a fatty liver, calculated as 8 x (ratio of serum ALT to serum AST) + body mass index (+ 2 for female, + 2 in case of diabetes). An HSI of at least36 was considered an indicator of fatty liver.
 

Less sleep, more risk

Participants in set 1 slept for a mean of 6.8 hours, with 58.6% sleeping more than 7 hours a day. Those in set 2 slept a mean of 6.9 hours during weekdays, with 59.9% sleeping more than 7 hours. They also slept a mean of 7.7 hours on weekends.

In set 1, sleeping at least7 hours was associated with a 16% lower risk for NAFLD (odds ratio, 0.84; 95% confidence interval, 0.79-0.89).

In set 2, sleeping at least 7 hours on weekdays was associated with a 19% reduced risk for NAFLD (OR, 0.81; 95% CI, 0.74-0.89). Sleeping at least 7 hours on the weekend was associated with a 22% reduced risk for NAFLD (OR, 0.78; 95% CI, 0.70-0.87). Compared with those who slept less than 7 hours throughout the week, those who slept less than 7 hours on weekdays and more than 7 hours on weekends had a 20% lower rate of NAFLD (OR, 0.80; 95% CI, 0.70-0.92).

All these associations held true for both men and women.
 

Why getting your Z’s may have hepatic advantages

One explanation for the link between sleep patterns and NAFLD is that dysregulation of cortisol, inflammatory cytokines, and norepinephrine are associated with both variations in sleep and NAFLD onset, Dr. Lee and colleagues wrote.

They also pointed out that a lack of sleep can reduce the secretion of two hormones that promote satiety: leptin and glucagonlike peptide–1. As a result, people who sleep less may eat more and gain weight, which increases the risk for NAFLD.

Ashwani K. Singal, MD, MS, a professor of medicine at the University of South Dakota, Vermillion, who was not involved in the study, noted that it was based on comparing a cross section of a population instead of following the participants over time.

“So, I think it’s an association rather than a cause and effect,” he said in an interview.

The authors don’t report a multivariate analysis to determine whether comorbidities or other characteristics of the patients could explain the association, he pointed out, noting that obesity, for example, can increase the risk for both NAFLD and sleep apnea.

Still, Dr. Singal said, the paper will influence him to mention sleep in the context of lifestyle factors that can affect fatty liver disease. “I’m going to tell my patients, and tell the community physicians to tell their patients, to follow a good sleep hygiene and make sure that they sleep at least 5-7 hours.”

Dr. Singal and the study authors all reported no relevant financial relationships. The study was supported by the National Research Foundation of Korea.

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

People who don’t get enough sleep during the week may be able to reduce their risk for nonalcoholic fatty liver disease (NAFLD) by catching up on the weekends, researchers say.

“Our study revealed that people who get enough sleep have a lower risk of developing NAFLD than those who get insufficient sleep,” Sangheun Lee, MD, PhD, from Catholic Kwandong University, Incheon, South Korea, and colleagues wrote in Annals of Hepatology.

However, they cautioned that further research is needed to verify their finding.

Previous studies have associated insufficient sleep with obesity, hypertension, diabetes mellitus, and cardiovascular disease, as well as liver fibrosis.

A busy weekday schedule can make it harder to get enough sleep, and some people try to compensate by sleeping longer on weekends. Studies so far have produced mixed findings on this strategy, with some showing that more sleep on the weekend reduces the risk for obesity, hypertension, and metabolic syndrome, and others showing no effect on metabolic dysregulation or energy balance.
 

Accessing a nation’s sleep data

To explore the relationship between sleep patterns and NAFLD, Dr. Lee and colleagues analyzed data from Korea National Health and Nutrition Examination Surveys collected from 2008 to 2019. They excluded people aged less than 20 years, those with hepatitis B or C infections, liver cirrhosis or liver cancer, shift workers and others who “slept irregularly,” and those who consumed alcohol excessively, leaving a cohort of 101,138 participants.

The survey didn’t distinguish between sleep on weekdays and weekends until 2016, so the researchers divided their findings into two: 68,759 people surveyed from 2008 to 2015 (set 1) and 32,379 surveyed from 2016 to 2019 (set 2).

Set 1 was further divided into those who averaged more than 7 hours of sleep per day and those who slept less than that. Set 2 was divided into three groups: one that averaged less than 7 hours of sleep per day and did not catch up on weekends, one that averaged less than 7 hours of sleep per day and did catch up on weekends, and one that averaged more than 7 hours of sleep throughout the week.

The researchers used the hepatic steatosis index (HSI) to determine the presence of a fatty liver, calculated as 8 x (ratio of serum ALT to serum AST) + body mass index (+ 2 for female, + 2 in case of diabetes). An HSI of at least36 was considered an indicator of fatty liver.
 

Less sleep, more risk

Participants in set 1 slept for a mean of 6.8 hours, with 58.6% sleeping more than 7 hours a day. Those in set 2 slept a mean of 6.9 hours during weekdays, with 59.9% sleeping more than 7 hours. They also slept a mean of 7.7 hours on weekends.

In set 1, sleeping at least7 hours was associated with a 16% lower risk for NAFLD (odds ratio, 0.84; 95% confidence interval, 0.79-0.89).

In set 2, sleeping at least 7 hours on weekdays was associated with a 19% reduced risk for NAFLD (OR, 0.81; 95% CI, 0.74-0.89). Sleeping at least 7 hours on the weekend was associated with a 22% reduced risk for NAFLD (OR, 0.78; 95% CI, 0.70-0.87). Compared with those who slept less than 7 hours throughout the week, those who slept less than 7 hours on weekdays and more than 7 hours on weekends had a 20% lower rate of NAFLD (OR, 0.80; 95% CI, 0.70-0.92).

All these associations held true for both men and women.
 

Why getting your Z’s may have hepatic advantages

One explanation for the link between sleep patterns and NAFLD is that dysregulation of cortisol, inflammatory cytokines, and norepinephrine are associated with both variations in sleep and NAFLD onset, Dr. Lee and colleagues wrote.

They also pointed out that a lack of sleep can reduce the secretion of two hormones that promote satiety: leptin and glucagonlike peptide–1. As a result, people who sleep less may eat more and gain weight, which increases the risk for NAFLD.

Ashwani K. Singal, MD, MS, a professor of medicine at the University of South Dakota, Vermillion, who was not involved in the study, noted that it was based on comparing a cross section of a population instead of following the participants over time.

“So, I think it’s an association rather than a cause and effect,” he said in an interview.

The authors don’t report a multivariate analysis to determine whether comorbidities or other characteristics of the patients could explain the association, he pointed out, noting that obesity, for example, can increase the risk for both NAFLD and sleep apnea.

Still, Dr. Singal said, the paper will influence him to mention sleep in the context of lifestyle factors that can affect fatty liver disease. “I’m going to tell my patients, and tell the community physicians to tell their patients, to follow a good sleep hygiene and make sure that they sleep at least 5-7 hours.”

Dr. Singal and the study authors all reported no relevant financial relationships. The study was supported by the National Research Foundation of Korea.

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

A prescription, digital therapeutic shows measurable brain changes that correlate with improved attention control in children with attention-deficit/hyperactivity disorder (ADHD).

Investigators found children who used the video game-based therapy (EndeavorRx) experienced increased brain activity related to attention function, as measured by EEG, which correlated with improvements in objective behavioral measures of attention.

Courtesy University of California, San Francisco

“While the previous multicenter trials show attention improvement for children using EndeavorRx, this is the first study to look at the brain activity in children with a primary concern of ADHD,” principal investigator Elysa Marco, MD, clinical executive for neurodevelopmental medicine at Cortica Healthcare, San Rafael, Calif., said in news release.

“It is exciting to see measurable improvement on the EEGs that correlates with the behavioral benefits,” said Dr. Marco.

The study was recently published online in PLOS ONE. 
 

Measurable changes

As previously reported by this news organization, the Food and Drug Administration approved EndeavorRx in June 2020 as a prescription video game–based therapeutic device for children aged 8-12 years with primarily inattentive or combined-type ADHD, who have a demonstrated attention issue.

“The device is intended for use as part of a therapeutic program that may include clinician-directed therapy, medication, and/or educational programs, which further address symptoms of the disorder,” the FDA said upon approval.

In the current unblinded, single-arm study, the researchers assessed 25 children (aged 8-12 years) with a confirmed diagnosis of ADHD on neural, behavioral, and clinical metrics of attention before and after a 4-week at-home intervention.

Participants were instructed to use EndeavorRx for about 25 minutes a day at least 5 days a week for 4 weeks, as recommended by the FDA.

“EndeavorRx enhanced midline frontal theta (MFT) activity, suggesting that patients who used EndeavorRx for 4 weeks showed changes in measurable brain function,” Anil S. Jina, MD, chief medical officer of Akili Interactive, told this news organization. Dr. Jina was not involved with the study.

There was also a correlation between MFT activity and attention functioning, “suggesting that children who experienced the largest gains in MFT activity as measured by EEG also showed the greatest improvements in computerized performance tests designed to measure attention,” Dr. Jina said.

In addition, parents reported significantly fewer inattention symptoms in children after EndeavorRx treatment, as measured by the Vanderbilt ADHD Diagnostic Rating Scale.
 

‘Not just another video game’

EndeavorRx has been evaluated in five clinical studies involving more than 600 children with ADHD, including the STARS-ADHD trial, a prospective, randomized, controlled study published in The Lancet Digital Health.

The STARS-ADHD trial randomly allocated 348 children to either EndeavorRx treatment or a controlled intervention, which was a word game.

The researchers reported statistically significant improvements in attentional functioning in the EndeavorRx group as rated by test of variables of attention.

“This is not just another video game,” STARS-ADHD trialist Scott H. Kollins, PhD, MS, a clinical psychologist at Duke Health’s ADHD Clinic in Durham, N.C., who helped developed it, previously told this news organization.   

The tool’s adaptive algorithms adjust and monitor task difficulty based on performance, using a video game format and rewards to engage users, he explained. EndeavorRx is a challenge to play by design.

“The treatment was programmed into the gameplay experience and designed to challenge a child’s attentional control during gameplay, requiring focus and flexibility to manage tasks at the same time,” Dr. Jina said in an interview.

“Unlike a video game that is designed only for entertainment purposes, to drive efficacy, EndeavorRx is designed to be challenging and can therefore sometimes feel repetitive, and frustrating to some children,” Dr. Jina said.

Commenting on the study, Stephen Faraone, PhD, distinguished professor of psychiatry and vice chair of research, department of psychiatry, State University of New York, Syracuse, said this study “supports the idea that EndeavorRx improves a neural measure of attention.

“The limitation is that we don’t know if this translates into clinically relevant outcomes,” cautioned Dr. Faraone, who was not associated with the current study.

“The main caveat about EndeavorRx is that it was cleared by the FDA for improving a computer-based measure of inattention, not inattentive symptoms as reported by the parents of children with ADHD,” he noted.

Several authors have disclosed financial relationships with Akili Interactive Labs, which funded the study. Dr. Faraone was an investigator on the STARS-ADHD trial.

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

A prescription, digital therapeutic shows measurable brain changes that correlate with improved attention control in children with attention-deficit/hyperactivity disorder (ADHD).

Investigators found children who used the video game-based therapy (EndeavorRx) experienced increased brain activity related to attention function, as measured by EEG, which correlated with improvements in objective behavioral measures of attention.

Courtesy University of California, San Francisco

“While the previous multicenter trials show attention improvement for children using EndeavorRx, this is the first study to look at the brain activity in children with a primary concern of ADHD,” principal investigator Elysa Marco, MD, clinical executive for neurodevelopmental medicine at Cortica Healthcare, San Rafael, Calif., said in news release.

“It is exciting to see measurable improvement on the EEGs that correlates with the behavioral benefits,” said Dr. Marco.

The study was recently published online in PLOS ONE. 
 

Measurable changes

As previously reported by this news organization, the Food and Drug Administration approved EndeavorRx in June 2020 as a prescription video game–based therapeutic device for children aged 8-12 years with primarily inattentive or combined-type ADHD, who have a demonstrated attention issue.

“The device is intended for use as part of a therapeutic program that may include clinician-directed therapy, medication, and/or educational programs, which further address symptoms of the disorder,” the FDA said upon approval.

In the current unblinded, single-arm study, the researchers assessed 25 children (aged 8-12 years) with a confirmed diagnosis of ADHD on neural, behavioral, and clinical metrics of attention before and after a 4-week at-home intervention.

Participants were instructed to use EndeavorRx for about 25 minutes a day at least 5 days a week for 4 weeks, as recommended by the FDA.

“EndeavorRx enhanced midline frontal theta (MFT) activity, suggesting that patients who used EndeavorRx for 4 weeks showed changes in measurable brain function,” Anil S. Jina, MD, chief medical officer of Akili Interactive, told this news organization. Dr. Jina was not involved with the study.

There was also a correlation between MFT activity and attention functioning, “suggesting that children who experienced the largest gains in MFT activity as measured by EEG also showed the greatest improvements in computerized performance tests designed to measure attention,” Dr. Jina said.

In addition, parents reported significantly fewer inattention symptoms in children after EndeavorRx treatment, as measured by the Vanderbilt ADHD Diagnostic Rating Scale.
 

‘Not just another video game’

EndeavorRx has been evaluated in five clinical studies involving more than 600 children with ADHD, including the STARS-ADHD trial, a prospective, randomized, controlled study published in The Lancet Digital Health.

The STARS-ADHD trial randomly allocated 348 children to either EndeavorRx treatment or a controlled intervention, which was a word game.

The researchers reported statistically significant improvements in attentional functioning in the EndeavorRx group as rated by test of variables of attention.

“This is not just another video game,” STARS-ADHD trialist Scott H. Kollins, PhD, MS, a clinical psychologist at Duke Health’s ADHD Clinic in Durham, N.C., who helped developed it, previously told this news organization.   

The tool’s adaptive algorithms adjust and monitor task difficulty based on performance, using a video game format and rewards to engage users, he explained. EndeavorRx is a challenge to play by design.

“The treatment was programmed into the gameplay experience and designed to challenge a child’s attentional control during gameplay, requiring focus and flexibility to manage tasks at the same time,” Dr. Jina said in an interview.

“Unlike a video game that is designed only for entertainment purposes, to drive efficacy, EndeavorRx is designed to be challenging and can therefore sometimes feel repetitive, and frustrating to some children,” Dr. Jina said.

Commenting on the study, Stephen Faraone, PhD, distinguished professor of psychiatry and vice chair of research, department of psychiatry, State University of New York, Syracuse, said this study “supports the idea that EndeavorRx improves a neural measure of attention.

“The limitation is that we don’t know if this translates into clinically relevant outcomes,” cautioned Dr. Faraone, who was not associated with the current study.

“The main caveat about EndeavorRx is that it was cleared by the FDA for improving a computer-based measure of inattention, not inattentive symptoms as reported by the parents of children with ADHD,” he noted.

Several authors have disclosed financial relationships with Akili Interactive Labs, which funded the study. Dr. Faraone was an investigator on the STARS-ADHD trial.

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

A prescription, digital therapeutic shows measurable brain changes that correlate with improved attention control in children with attention-deficit/hyperactivity disorder (ADHD).

Investigators found children who used the video game-based therapy (EndeavorRx) experienced increased brain activity related to attention function, as measured by EEG, which correlated with improvements in objective behavioral measures of attention.

Courtesy University of California, San Francisco

“While the previous multicenter trials show attention improvement for children using EndeavorRx, this is the first study to look at the brain activity in children with a primary concern of ADHD,” principal investigator Elysa Marco, MD, clinical executive for neurodevelopmental medicine at Cortica Healthcare, San Rafael, Calif., said in news release.

“It is exciting to see measurable improvement on the EEGs that correlates with the behavioral benefits,” said Dr. Marco.

The study was recently published online in PLOS ONE. 
 

Measurable changes

As previously reported by this news organization, the Food and Drug Administration approved EndeavorRx in June 2020 as a prescription video game–based therapeutic device for children aged 8-12 years with primarily inattentive or combined-type ADHD, who have a demonstrated attention issue.

“The device is intended for use as part of a therapeutic program that may include clinician-directed therapy, medication, and/or educational programs, which further address symptoms of the disorder,” the FDA said upon approval.

In the current unblinded, single-arm study, the researchers assessed 25 children (aged 8-12 years) with a confirmed diagnosis of ADHD on neural, behavioral, and clinical metrics of attention before and after a 4-week at-home intervention.

Participants were instructed to use EndeavorRx for about 25 minutes a day at least 5 days a week for 4 weeks, as recommended by the FDA.

“EndeavorRx enhanced midline frontal theta (MFT) activity, suggesting that patients who used EndeavorRx for 4 weeks showed changes in measurable brain function,” Anil S. Jina, MD, chief medical officer of Akili Interactive, told this news organization. Dr. Jina was not involved with the study.

There was also a correlation between MFT activity and attention functioning, “suggesting that children who experienced the largest gains in MFT activity as measured by EEG also showed the greatest improvements in computerized performance tests designed to measure attention,” Dr. Jina said.

In addition, parents reported significantly fewer inattention symptoms in children after EndeavorRx treatment, as measured by the Vanderbilt ADHD Diagnostic Rating Scale.
 

‘Not just another video game’

EndeavorRx has been evaluated in five clinical studies involving more than 600 children with ADHD, including the STARS-ADHD trial, a prospective, randomized, controlled study published in The Lancet Digital Health.

The STARS-ADHD trial randomly allocated 348 children to either EndeavorRx treatment or a controlled intervention, which was a word game.

The researchers reported statistically significant improvements in attentional functioning in the EndeavorRx group as rated by test of variables of attention.

“This is not just another video game,” STARS-ADHD trialist Scott H. Kollins, PhD, MS, a clinical psychologist at Duke Health’s ADHD Clinic in Durham, N.C., who helped developed it, previously told this news organization.   

The tool’s adaptive algorithms adjust and monitor task difficulty based on performance, using a video game format and rewards to engage users, he explained. EndeavorRx is a challenge to play by design.

“The treatment was programmed into the gameplay experience and designed to challenge a child’s attentional control during gameplay, requiring focus and flexibility to manage tasks at the same time,” Dr. Jina said in an interview.

“Unlike a video game that is designed only for entertainment purposes, to drive efficacy, EndeavorRx is designed to be challenging and can therefore sometimes feel repetitive, and frustrating to some children,” Dr. Jina said.

Commenting on the study, Stephen Faraone, PhD, distinguished professor of psychiatry and vice chair of research, department of psychiatry, State University of New York, Syracuse, said this study “supports the idea that EndeavorRx improves a neural measure of attention.

“The limitation is that we don’t know if this translates into clinically relevant outcomes,” cautioned Dr. Faraone, who was not associated with the current study.

“The main caveat about EndeavorRx is that it was cleared by the FDA for improving a computer-based measure of inattention, not inattentive symptoms as reported by the parents of children with ADHD,” he noted.

Several authors have disclosed financial relationships with Akili Interactive Labs, which funded the study. Dr. Faraone was an investigator on the STARS-ADHD trial.

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

Although the Sentinel cerebral embolism protection (CEP) device may not significantly reduce the overall stroke rate in patients after they’ve had transcatheter aortic valve replacement (TAVR), the device may improve survival and reduce the severity of procedure-related stroke, a retrospective database study reported.

Investigators led by Samir R. Kapadia, MD, chair of cardiovascular medicine at the Cleveland Clinic, analyzed outcomes of 136,382 patients in the Nationwide Readmissions Database who had TAVR in 2018-2019. The dataset included 10,201 people who received the Sentinel CEP device during TAVR.

The proportion of patients who had a stroke after TAVR was similar in both groups – 1.85% (189) in the CEP group and 1.94% (1,447) in the CEP nonusers – but, as Dr. Kapadia pointed out, the stroke outcomes between the two groups were noticeably different.

“Interestingly enough, what we found was that the people with the CEPs who had a stroke had half the mortality, and they were going home at a significantly higher rate, than the people who had a stroke and didn’t have CEPs,” Dr. Kapadia said in an interview. A previous registry study of 276,316 TAVR patients reported the overall rate of post-TAVR stroke declined from 2.75% to 2.3% over an 8-year period. The CEP device, approved in December 2017, had been available in the last 2 years of that study.

In the current retrospective database study, CEP patients went home after their post-TAVR strokes at a rate of 28.2%, compared with 19.9% for those who didn’t have CEP (P = .011). The in-hospital death rates were 6.3% and 11.8% for the respective groups (P = .023), and the 30-day readmission rates were 15.9% and 16.8% (P = .91). “The readmission rate is similar, but if you survive you get admitted,” Dr. Kapadia reported in a research letter published in JACC: Cardiovascular Interventions.

CEP involves inserting a catheter in the right wrist during TAVR. The catheter deploys two filters, one in the left carotid artery, the other on the right carotid and radial arteries, to capture embolic debris. After the aortic valve is seated and the TAVR completed, the CEP filters are removed.

Potential effectiveness of filters

The study builds on work by Dr. Kapadia and colleagues reported in the PARTNER trial, which showed that CEP filters consistently captured embolized debris resulting in smaller brain lesions after TAVR than no filters. The hypothesis for the latest study, Dr. Kapadia said, “was that, even though the stroke rates may be very similar between the TAVR patients who had CEP and those who did not, the filter removed the large embolic particles, although there were small particles. In those cases, the consequence of stroke would be much less in the sense that you would have minor strokes, and you would either not die from the stroke or you would be able to walk home safely if you did have a stroke.”

In Dr. Kapadia’s experience, the filters capture up to 80% of embolic debris. The Cleveland Clinic used CEP in 96.5% of its TAVR cases in 2021, he said, adding that national rates are considerably lower because Medicare doesn’t reimburse for the procedure. An observational registry study reported that 13% of TAVR procedures used CEP by December 2019.

Dr. Kapadia said that the PROTECTED TAVR trial of the CEP device has completed data gathering and should report results later in 2022. The study randomized 3,000 patients to TAVR with or without CEP.

Dr. Kapadia noted that the findings require further study to validate them. “If it is all true, it will change the practice; it will make TAVR safer.”

David J. Cohen, MD, MSc, director of clinical and outcome research at the Cardiovascular Research Foundation in New York, called the study findings “provocative,” adding: “It makes points that we’ve seen in previous studies and certainly suggests there may be an important benefit of cerebral embolism protection that has not been well established to date.” Dr. Cohen is also director of academic affairs at St. Francis Hospital in Roslyn, N.Y.

The primary two findings of the study – lower risk of death and greater likelihood of discharge to home in CEP patients who had strokes after TAVR – “suggest that, while data on whether embolic protection actually prevents strokes is controversial and not at all definitive, these data suggest that perhaps one additional mechanism of benefit is that it’s making it much less severe when stroke occurs. That would obviously be of tremendous value.”

The findings are in line with other “suggestions that have not yet been explained,” Dr. Cohen said. “They may provide sort of a unifying explanation of why embolic protection may not prevent as many strokes as we thought but they may still be a very valuable adjunct.”

Boston Scientific distributes the Sentinel CEP device used in the study. Dr. Kapadia is the principal investigator of the PROTECTED TAVR trial, sponsored by Boston Scientific. Dr. Kapadia and study coauthors reported no other disclosures. Dr. Cohen is a consultant to Boston Scientific.

Although the Sentinel cerebral embolism protection (CEP) device may not significantly reduce the overall stroke rate in patients after they’ve had transcatheter aortic valve replacement (TAVR), the device may improve survival and reduce the severity of procedure-related stroke, a retrospective database study reported.

Investigators led by Samir R. Kapadia, MD, chair of cardiovascular medicine at the Cleveland Clinic, analyzed outcomes of 136,382 patients in the Nationwide Readmissions Database who had TAVR in 2018-2019. The dataset included 10,201 people who received the Sentinel CEP device during TAVR.

The proportion of patients who had a stroke after TAVR was similar in both groups – 1.85% (189) in the CEP group and 1.94% (1,447) in the CEP nonusers – but, as Dr. Kapadia pointed out, the stroke outcomes between the two groups were noticeably different.

“Interestingly enough, what we found was that the people with the CEPs who had a stroke had half the mortality, and they were going home at a significantly higher rate, than the people who had a stroke and didn’t have CEPs,” Dr. Kapadia said in an interview. A previous registry study of 276,316 TAVR patients reported the overall rate of post-TAVR stroke declined from 2.75% to 2.3% over an 8-year period. The CEP device, approved in December 2017, had been available in the last 2 years of that study.

In the current retrospective database study, CEP patients went home after their post-TAVR strokes at a rate of 28.2%, compared with 19.9% for those who didn’t have CEP (P = .011). The in-hospital death rates were 6.3% and 11.8% for the respective groups (P = .023), and the 30-day readmission rates were 15.9% and 16.8% (P = .91). “The readmission rate is similar, but if you survive you get admitted,” Dr. Kapadia reported in a research letter published in JACC: Cardiovascular Interventions.

CEP involves inserting a catheter in the right wrist during TAVR. The catheter deploys two filters, one in the left carotid artery, the other on the right carotid and radial arteries, to capture embolic debris. After the aortic valve is seated and the TAVR completed, the CEP filters are removed.

Potential effectiveness of filters

The study builds on work by Dr. Kapadia and colleagues reported in the PARTNER trial, which showed that CEP filters consistently captured embolized debris resulting in smaller brain lesions after TAVR than no filters. The hypothesis for the latest study, Dr. Kapadia said, “was that, even though the stroke rates may be very similar between the TAVR patients who had CEP and those who did not, the filter removed the large embolic particles, although there were small particles. In those cases, the consequence of stroke would be much less in the sense that you would have minor strokes, and you would either not die from the stroke or you would be able to walk home safely if you did have a stroke.”

In Dr. Kapadia’s experience, the filters capture up to 80% of embolic debris. The Cleveland Clinic used CEP in 96.5% of its TAVR cases in 2021, he said, adding that national rates are considerably lower because Medicare doesn’t reimburse for the procedure. An observational registry study reported that 13% of TAVR procedures used CEP by December 2019.

Dr. Kapadia said that the PROTECTED TAVR trial of the CEP device has completed data gathering and should report results later in 2022. The study randomized 3,000 patients to TAVR with or without CEP.

Dr. Kapadia noted that the findings require further study to validate them. “If it is all true, it will change the practice; it will make TAVR safer.”

David J. Cohen, MD, MSc, director of clinical and outcome research at the Cardiovascular Research Foundation in New York, called the study findings “provocative,” adding: “It makes points that we’ve seen in previous studies and certainly suggests there may be an important benefit of cerebral embolism protection that has not been well established to date.” Dr. Cohen is also director of academic affairs at St. Francis Hospital in Roslyn, N.Y.

The primary two findings of the study – lower risk of death and greater likelihood of discharge to home in CEP patients who had strokes after TAVR – “suggest that, while data on whether embolic protection actually prevents strokes is controversial and not at all definitive, these data suggest that perhaps one additional mechanism of benefit is that it’s making it much less severe when stroke occurs. That would obviously be of tremendous value.”

The findings are in line with other “suggestions that have not yet been explained,” Dr. Cohen said. “They may provide sort of a unifying explanation of why embolic protection may not prevent as many strokes as we thought but they may still be a very valuable adjunct.”

Boston Scientific distributes the Sentinel CEP device used in the study. Dr. Kapadia is the principal investigator of the PROTECTED TAVR trial, sponsored by Boston Scientific. Dr. Kapadia and study coauthors reported no other disclosures. Dr. Cohen is a consultant to Boston Scientific.

Although the Sentinel cerebral embolism protection (CEP) device may not significantly reduce the overall stroke rate in patients after they’ve had transcatheter aortic valve replacement (TAVR), the device may improve survival and reduce the severity of procedure-related stroke, a retrospective database study reported.

Investigators led by Samir R. Kapadia, MD, chair of cardiovascular medicine at the Cleveland Clinic, analyzed outcomes of 136,382 patients in the Nationwide Readmissions Database who had TAVR in 2018-2019. The dataset included 10,201 people who received the Sentinel CEP device during TAVR.

The proportion of patients who had a stroke after TAVR was similar in both groups – 1.85% (189) in the CEP group and 1.94% (1,447) in the CEP nonusers – but, as Dr. Kapadia pointed out, the stroke outcomes between the two groups were noticeably different.

“Interestingly enough, what we found was that the people with the CEPs who had a stroke had half the mortality, and they were going home at a significantly higher rate, than the people who had a stroke and didn’t have CEPs,” Dr. Kapadia said in an interview. A previous registry study of 276,316 TAVR patients reported the overall rate of post-TAVR stroke declined from 2.75% to 2.3% over an 8-year period. The CEP device, approved in December 2017, had been available in the last 2 years of that study.

In the current retrospective database study, CEP patients went home after their post-TAVR strokes at a rate of 28.2%, compared with 19.9% for those who didn’t have CEP (P = .011). The in-hospital death rates were 6.3% and 11.8% for the respective groups (P = .023), and the 30-day readmission rates were 15.9% and 16.8% (P = .91). “The readmission rate is similar, but if you survive you get admitted,” Dr. Kapadia reported in a research letter published in JACC: Cardiovascular Interventions.

CEP involves inserting a catheter in the right wrist during TAVR. The catheter deploys two filters, one in the left carotid artery, the other on the right carotid and radial arteries, to capture embolic debris. After the aortic valve is seated and the TAVR completed, the CEP filters are removed.

Potential effectiveness of filters

The study builds on work by Dr. Kapadia and colleagues reported in the PARTNER trial, which showed that CEP filters consistently captured embolized debris resulting in smaller brain lesions after TAVR than no filters. The hypothesis for the latest study, Dr. Kapadia said, “was that, even though the stroke rates may be very similar between the TAVR patients who had CEP and those who did not, the filter removed the large embolic particles, although there were small particles. In those cases, the consequence of stroke would be much less in the sense that you would have minor strokes, and you would either not die from the stroke or you would be able to walk home safely if you did have a stroke.”

In Dr. Kapadia’s experience, the filters capture up to 80% of embolic debris. The Cleveland Clinic used CEP in 96.5% of its TAVR cases in 2021, he said, adding that national rates are considerably lower because Medicare doesn’t reimburse for the procedure. An observational registry study reported that 13% of TAVR procedures used CEP by December 2019.

Dr. Kapadia said that the PROTECTED TAVR trial of the CEP device has completed data gathering and should report results later in 2022. The study randomized 3,000 patients to TAVR with or without CEP.

Dr. Kapadia noted that the findings require further study to validate them. “If it is all true, it will change the practice; it will make TAVR safer.”

David J. Cohen, MD, MSc, director of clinical and outcome research at the Cardiovascular Research Foundation in New York, called the study findings “provocative,” adding: “It makes points that we’ve seen in previous studies and certainly suggests there may be an important benefit of cerebral embolism protection that has not been well established to date.” Dr. Cohen is also director of academic affairs at St. Francis Hospital in Roslyn, N.Y.

The primary two findings of the study – lower risk of death and greater likelihood of discharge to home in CEP patients who had strokes after TAVR – “suggest that, while data on whether embolic protection actually prevents strokes is controversial and not at all definitive, these data suggest that perhaps one additional mechanism of benefit is that it’s making it much less severe when stroke occurs. That would obviously be of tremendous value.”

The findings are in line with other “suggestions that have not yet been explained,” Dr. Cohen said. “They may provide sort of a unifying explanation of why embolic protection may not prevent as many strokes as we thought but they may still be a very valuable adjunct.”

Boston Scientific distributes the Sentinel CEP device used in the study. Dr. Kapadia is the principal investigator of the PROTECTED TAVR trial, sponsored by Boston Scientific. Dr. Kapadia and study coauthors reported no other disclosures. Dr. Cohen is a consultant to Boston Scientific.

Who is most at risk of suicide by drug overdose? Has that changed in recent years? Researchers at the National Institute on Drug Abuse analyzed data from 2001 to 2019 from the Centers for Disease Control and Prevention’s National Vital Statistics System to find out.

On the whole, they say, intentional overdose deaths have declined. But suicide rates increased in certain subgroups: young adults (aged 15-24 years), older adults (aged 75-84 years), and non-Hispanic Black women. Rates among women were “consistently higher” than those of men. The highest rates were observed in women aged 45 to 64 years.

Monday was the worst day, and the weekends had the lowest rates. The researchers say social factors, such as more social interactions on the weekend and reluctance about starting the workweek, could be factors.

Seasonally, the numbers ran true to the pattern seen in previous studies: The lowest rates occurred in December and highest in late spring and summer. Perhaps the “collective optimism” of the holiday season and social interactions exert protective effects against suicidality, the researchers suggest.

Factors also may include biological changes. In this study, the researchers found a positive linear relationship between daylength, which varies by latitude, and intentional overdose deaths for both sexes. Daylength is associated with mu opioid receptor (MOR) availability that might underlie seasonal variations in mood, they posit. MORs are the main target of opioid drugs; the researchers cite a study that found altered MOR expression in postmortem brains of suicide victims.

They note some limitations of their study, one being that, in 2019, 5% of overdose deaths had undetermined intent. Improving classifications of overdose deaths is needed, they say.

Moreover, the trends might have changed during the pandemic, as provisional mortality data indicate decreases in deaths by suicides, but also an approximate 30% increase in overall overdose deaths.

“This research underscores the importance of external support structures and environmental factors in determining a person’s suicide risk,” said Emily B. Einstein, PhD, chief of the National Institute on Drug Abuse’s Science Policy Branch and an author on the study. “The risk of intentional overdoses, and suicide risk in general, is not static. This is crucial for clinicians to keep in mind, as they may need to assess patients’ suicide risk frequently rather than at one point in time. It is also important for friends and family members of people who may be at an increased risk of suicide, and for those people themselves, so that they can be aware of the greatest periods of risk and seek help when needed.”

Sources: https://www.nih.gov/news-events/news-releases/suicides-drug-overdose-increased-among-young-people-elderly-people-black-women-despite-overall-downward-tren

Han B, Compton WM, Einstein EB, et al. Intentional drug overdose deaths in the United States.  Am J Psychiatry. doi:10.1176/appi.ajp.2021.21060604

Who is most at risk of suicide by drug overdose? Has that changed in recent years? Researchers at the National Institute on Drug Abuse analyzed data from 2001 to 2019 from the Centers for Disease Control and Prevention’s National Vital Statistics System to find out.

On the whole, they say, intentional overdose deaths have declined. But suicide rates increased in certain subgroups: young adults (aged 15-24 years), older adults (aged 75-84 years), and non-Hispanic Black women. Rates among women were “consistently higher” than those of men. The highest rates were observed in women aged 45 to 64 years.

Monday was the worst day, and the weekends had the lowest rates. The researchers say social factors, such as more social interactions on the weekend and reluctance about starting the workweek, could be factors.

Seasonally, the numbers ran true to the pattern seen in previous studies: The lowest rates occurred in December and highest in late spring and summer. Perhaps the “collective optimism” of the holiday season and social interactions exert protective effects against suicidality, the researchers suggest.

Factors also may include biological changes. In this study, the researchers found a positive linear relationship between daylength, which varies by latitude, and intentional overdose deaths for both sexes. Daylength is associated with mu opioid receptor (MOR) availability that might underlie seasonal variations in mood, they posit. MORs are the main target of opioid drugs; the researchers cite a study that found altered MOR expression in postmortem brains of suicide victims.

They note some limitations of their study, one being that, in 2019, 5% of overdose deaths had undetermined intent. Improving classifications of overdose deaths is needed, they say.

Moreover, the trends might have changed during the pandemic, as provisional mortality data indicate decreases in deaths by suicides, but also an approximate 30% increase in overall overdose deaths.

“This research underscores the importance of external support structures and environmental factors in determining a person’s suicide risk,” said Emily B. Einstein, PhD, chief of the National Institute on Drug Abuse’s Science Policy Branch and an author on the study. “The risk of intentional overdoses, and suicide risk in general, is not static. This is crucial for clinicians to keep in mind, as they may need to assess patients’ suicide risk frequently rather than at one point in time. It is also important for friends and family members of people who may be at an increased risk of suicide, and for those people themselves, so that they can be aware of the greatest periods of risk and seek help when needed.”

Sources: https://www.nih.gov/news-events/news-releases/suicides-drug-overdose-increased-among-young-people-elderly-people-black-women-despite-overall-downward-tren

Han B, Compton WM, Einstein EB, et al. Intentional drug overdose deaths in the United States.  Am J Psychiatry. doi:10.1176/appi.ajp.2021.21060604

Who is most at risk of suicide by drug overdose? Has that changed in recent years? Researchers at the National Institute on Drug Abuse analyzed data from 2001 to 2019 from the Centers for Disease Control and Prevention’s National Vital Statistics System to find out.

On the whole, they say, intentional overdose deaths have declined. But suicide rates increased in certain subgroups: young adults (aged 15-24 years), older adults (aged 75-84 years), and non-Hispanic Black women. Rates among women were “consistently higher” than those of men. The highest rates were observed in women aged 45 to 64 years.

Monday was the worst day, and the weekends had the lowest rates. The researchers say social factors, such as more social interactions on the weekend and reluctance about starting the workweek, could be factors.

Seasonally, the numbers ran true to the pattern seen in previous studies: The lowest rates occurred in December and highest in late spring and summer. Perhaps the “collective optimism” of the holiday season and social interactions exert protective effects against suicidality, the researchers suggest.

Factors also may include biological changes. In this study, the researchers found a positive linear relationship between daylength, which varies by latitude, and intentional overdose deaths for both sexes. Daylength is associated with mu opioid receptor (MOR) availability that might underlie seasonal variations in mood, they posit. MORs are the main target of opioid drugs; the researchers cite a study that found altered MOR expression in postmortem brains of suicide victims.

They note some limitations of their study, one being that, in 2019, 5% of overdose deaths had undetermined intent. Improving classifications of overdose deaths is needed, they say.

Moreover, the trends might have changed during the pandemic, as provisional mortality data indicate decreases in deaths by suicides, but also an approximate 30% increase in overall overdose deaths.

“This research underscores the importance of external support structures and environmental factors in determining a person’s suicide risk,” said Emily B. Einstein, PhD, chief of the National Institute on Drug Abuse’s Science Policy Branch and an author on the study. “The risk of intentional overdoses, and suicide risk in general, is not static. This is crucial for clinicians to keep in mind, as they may need to assess patients’ suicide risk frequently rather than at one point in time. It is also important for friends and family members of people who may be at an increased risk of suicide, and for those people themselves, so that they can be aware of the greatest periods of risk and seek help when needed.”

Sources: https://www.nih.gov/news-events/news-releases/suicides-drug-overdose-increased-among-young-people-elderly-people-black-women-despite-overall-downward-tren

Han B, Compton WM, Einstein EB, et al. Intentional drug overdose deaths in the United States.  Am J Psychiatry. doi:10.1176/appi.ajp.2021.21060604

Unless air pollution and smoking patterns are reversed, lung cancer cases and deaths will grow unabated in some countries, according to estimates of lung cancer incident cases, deaths, and their age-standardized rates.

The findings, based on recently released data from GLOBOCAN 2020 projected to the year 2050, suggest that the lung cancer epidemic will continue to unfold, according to Rajesh Sharma, PhD, et al., in a study published in the International Journal of Clinical Oncology. GLOBOCAN 2020 is an online database produced by the International Agency for Research on Cancer. It provides global cancer statistics from 185 countries for 36 cancer types.

The increase in lung cancer, the leading cancer worldwide in terms of deaths, is generally attributed to increases in cigarette smoking, Sharma et al. wrote. They point out that, while cigarette smoking is expected to have peaked in industrialized countries in the latter half of the twentieth century, the tobacco smoking epidemic is unfolding in regions of Asia and Africa with concomitant increases in lung cancer burden in several countries. Smoking is the most significant lung cancer risk factor, followed by air pollution (especially particulate matter, passive smoking, and occupational exposure to radon and asbestos).

The authors investigated bivariate associations between smoking prevalence and age-standardized rates of lung cancer, and projected lung cancer incident cases and deaths to 2050. They also looked at mortality-to-incidence, considered to be a proxy indicator of 5-year survival, and at human development index, a measure including life expectancy at birth, years of schooling, and standard of living. The results, they state, are expected to aid in policy formulation to combat the lung cancer burden at global, regional, and national levels.

Tobacco smoking prevalence was 21.9% worldwide in 2016, with tobacco smoking prevalence exceeding 25% in 57/149 countries. It was high in European countries with 5 of the top-10 countries among the 149 countries within Europe. Prevalence was greater than 10% in all European countries. Notably, 11/33 countries in Africa had a smoking prevalence less than 10%.

Analysis showed 2.21 million new lung cancer cases and 1.8 million deaths attributed to lung cancer worldwide in 2020, with males accounting for about two-thirds of the burden. The analysis projection for 2050 was for 3.8 million incident cases of lung cancer and 3.2 million lung cancer deaths globally. In 2050, lung cancer cases and deaths are projected to be more than 100,000 in 10/21 regions, led by Eastern Asia, projected to record 1.7 million incident cases and 1.5 million deaths.

The burden of lung cancer in regions of Asia and Africa is expected to increase at least twofold from 2020 to 2050, surpassing European regions that are expected to have the smallest increases. Also, while incident cases will remain much higher in Northern America than in Southeastern Asia and South-Central Asia, the number of lives lost is projected to be similar. The age-specific incidence and death rates rose with age such that the oldest age groups had the highest age-specific rates. With the human development index, mortality-to-incidence showed a negative correlation.

The authors wrote that worsening smoking and pollution levels in developing countries may push the future lung cancer burden much higher than these projections. Unless reversed, cases and death will grow unabated.

“Countering the burden of lung cancer also requires curtailment of other risk factors such as air pollution and exposure to carcinogens,” the authors wrote.

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors stated that they have no conflicts of interest.

Unless air pollution and smoking patterns are reversed, lung cancer cases and deaths will grow unabated in some countries, according to estimates of lung cancer incident cases, deaths, and their age-standardized rates.

The findings, based on recently released data from GLOBOCAN 2020 projected to the year 2050, suggest that the lung cancer epidemic will continue to unfold, according to Rajesh Sharma, PhD, et al., in a study published in the International Journal of Clinical Oncology. GLOBOCAN 2020 is an online database produced by the International Agency for Research on Cancer. It provides global cancer statistics from 185 countries for 36 cancer types.

The increase in lung cancer, the leading cancer worldwide in terms of deaths, is generally attributed to increases in cigarette smoking, Sharma et al. wrote. They point out that, while cigarette smoking is expected to have peaked in industrialized countries in the latter half of the twentieth century, the tobacco smoking epidemic is unfolding in regions of Asia and Africa with concomitant increases in lung cancer burden in several countries. Smoking is the most significant lung cancer risk factor, followed by air pollution (especially particulate matter, passive smoking, and occupational exposure to radon and asbestos).

The authors investigated bivariate associations between smoking prevalence and age-standardized rates of lung cancer, and projected lung cancer incident cases and deaths to 2050. They also looked at mortality-to-incidence, considered to be a proxy indicator of 5-year survival, and at human development index, a measure including life expectancy at birth, years of schooling, and standard of living. The results, they state, are expected to aid in policy formulation to combat the lung cancer burden at global, regional, and national levels.

Tobacco smoking prevalence was 21.9% worldwide in 2016, with tobacco smoking prevalence exceeding 25% in 57/149 countries. It was high in European countries with 5 of the top-10 countries among the 149 countries within Europe. Prevalence was greater than 10% in all European countries. Notably, 11/33 countries in Africa had a smoking prevalence less than 10%.

Analysis showed 2.21 million new lung cancer cases and 1.8 million deaths attributed to lung cancer worldwide in 2020, with males accounting for about two-thirds of the burden. The analysis projection for 2050 was for 3.8 million incident cases of lung cancer and 3.2 million lung cancer deaths globally. In 2050, lung cancer cases and deaths are projected to be more than 100,000 in 10/21 regions, led by Eastern Asia, projected to record 1.7 million incident cases and 1.5 million deaths.

The burden of lung cancer in regions of Asia and Africa is expected to increase at least twofold from 2020 to 2050, surpassing European regions that are expected to have the smallest increases. Also, while incident cases will remain much higher in Northern America than in Southeastern Asia and South-Central Asia, the number of lives lost is projected to be similar. The age-specific incidence and death rates rose with age such that the oldest age groups had the highest age-specific rates. With the human development index, mortality-to-incidence showed a negative correlation.

The authors wrote that worsening smoking and pollution levels in developing countries may push the future lung cancer burden much higher than these projections. Unless reversed, cases and death will grow unabated.

“Countering the burden of lung cancer also requires curtailment of other risk factors such as air pollution and exposure to carcinogens,” the authors wrote.

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors stated that they have no conflicts of interest.

Unless air pollution and smoking patterns are reversed, lung cancer cases and deaths will grow unabated in some countries, according to estimates of lung cancer incident cases, deaths, and their age-standardized rates.

The findings, based on recently released data from GLOBOCAN 2020 projected to the year 2050, suggest that the lung cancer epidemic will continue to unfold, according to Rajesh Sharma, PhD, et al., in a study published in the International Journal of Clinical Oncology. GLOBOCAN 2020 is an online database produced by the International Agency for Research on Cancer. It provides global cancer statistics from 185 countries for 36 cancer types.

The increase in lung cancer, the leading cancer worldwide in terms of deaths, is generally attributed to increases in cigarette smoking, Sharma et al. wrote. They point out that, while cigarette smoking is expected to have peaked in industrialized countries in the latter half of the twentieth century, the tobacco smoking epidemic is unfolding in regions of Asia and Africa with concomitant increases in lung cancer burden in several countries. Smoking is the most significant lung cancer risk factor, followed by air pollution (especially particulate matter, passive smoking, and occupational exposure to radon and asbestos).

The authors investigated bivariate associations between smoking prevalence and age-standardized rates of lung cancer, and projected lung cancer incident cases and deaths to 2050. They also looked at mortality-to-incidence, considered to be a proxy indicator of 5-year survival, and at human development index, a measure including life expectancy at birth, years of schooling, and standard of living. The results, they state, are expected to aid in policy formulation to combat the lung cancer burden at global, regional, and national levels.

Tobacco smoking prevalence was 21.9% worldwide in 2016, with tobacco smoking prevalence exceeding 25% in 57/149 countries. It was high in European countries with 5 of the top-10 countries among the 149 countries within Europe. Prevalence was greater than 10% in all European countries. Notably, 11/33 countries in Africa had a smoking prevalence less than 10%.

Analysis showed 2.21 million new lung cancer cases and 1.8 million deaths attributed to lung cancer worldwide in 2020, with males accounting for about two-thirds of the burden. The analysis projection for 2050 was for 3.8 million incident cases of lung cancer and 3.2 million lung cancer deaths globally. In 2050, lung cancer cases and deaths are projected to be more than 100,000 in 10/21 regions, led by Eastern Asia, projected to record 1.7 million incident cases and 1.5 million deaths.

The burden of lung cancer in regions of Asia and Africa is expected to increase at least twofold from 2020 to 2050, surpassing European regions that are expected to have the smallest increases. Also, while incident cases will remain much higher in Northern America than in Southeastern Asia and South-Central Asia, the number of lives lost is projected to be similar. The age-specific incidence and death rates rose with age such that the oldest age groups had the highest age-specific rates. With the human development index, mortality-to-incidence showed a negative correlation.

The authors wrote that worsening smoking and pollution levels in developing countries may push the future lung cancer burden much higher than these projections. Unless reversed, cases and death will grow unabated.

“Countering the burden of lung cancer also requires curtailment of other risk factors such as air pollution and exposure to carcinogens,” the authors wrote.

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. The authors stated that they have no conflicts of interest.

First responders exposed to toxic dusts and fibers in the aftermath of the World Trade Center (WTC) terror attacks show increased levels of clonal hematopoiesis linked to the development of blood cancers, new research finds. These results add to concerns about the long-term health effects of that exposure and further underscore a need for screening of those exposed.

“These data demonstrate that environmental exposure to the WTC disaster site is associated with a higher burden of clonal hematopoiesis, exceeding that expected in normal aging, and establish a rationale for mutational testing of the larger WTC-exposed population,” report the authors in the study, published March 7 in Nature Medicine.

The findings come from a study of blood samples from WTC first responders, including 429 firefighters and 52 emergency medical service workers, collected between December 2013 and October 2015.

For comparisons, the authors collected blood samples from 255 firefighters from in and around Nashville, Tenn., none of whom had been exposed to the 9/11 disaster.

Genetic analysis of the samples showed that 10% of those in the WTC-exposed cohort (n = 48) had unique somatic mutations considered to likely be pathogenic, and six of those individuals carried one or more of the mutations.

After a multivariate adjustment controlling for age, sex and race/ethnicity, those among the WTC-exposed first responders had a significantly increased odds of clonal hematopoiesis versus nonexposed workers (odds ratio [OR] = 3.14; P = .0006).

The higher risk was further observed in a comparison limited only to the WTC-exposed firefighters versus nonexposed firefighters (OR = 2.93; P = .0014) after the multivariate adjustment. The greater association between WTC exposure and clonal hematopoiesis remained after the researchers controlled for smoking as well as other risk factors among the WTC-exposed group overall (OR = 3.05; P = .0015) and the firefighters-only comparison (OR = 2.78; P = .004).

A history of smoking was not significantly associated with an increased risk of clonal hematopoiesis in either model.

As a risk factor for hematologic malignancy, cardiovascular events, and mortality, “clonal hematopoiesis is a concerning acquired risk not only for diseases that are already associated with WTC exposure but also as the population ages, this may exacerbate their risk profile,” Dr. Anna Nolan, coauthor of the study, and professor of medicine and environmental medicine in the division of pulmonary and critical care, New York University, said in an interview.

The most common gene mutations observed in the WTC-exposed group were those associated with myeloid malignancies, such as chronic myeloid leukemia; however, blood counts in the exposed group showed no association between exposure and mutations linked to cytopenias.

A further analysis on mice, investigating how WTC particulate matter uniquely affects DNA, surprisingly showed that just one exposure to the material was associated with clonal hematopoietic changes.

Courtesy NYU Langone Health

“Exposure to particulates, even at a single time point, can yield clonal mutations that may be risk for multisystem end-organ changes,” Dr. Nolan said.

While the serious health effects of WTC exposure on humans, have been extensively documented, including a study published in February showing increases in skin, prostate and thyroid cancers, clonal hematopoiesis suggests further heightened risks as the exposed population grows older, Dr. Nolan noted.

“[Clonal hematopoiesis] is a concerning acquired risk not only for diseases that are already associated with WTC exposure, but also, as the population ages, this may exacerbate their risk profile,” she said.

Due to the risk, “clinicians should be aware that WTC-exposed first responders have had a significant exposure and that they are at risk for developing several conditions.”

Commenting on this study, William K. Oh, MD, whose team at the Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, has reported in a previous study on the increased risk of prostate cancer among WTC first responders, noted that more time may be necessary to better understand the full effects of the increases in clonal hematopoiesis.

“Though these findings are of concern, there were still no differences in the cohorts in actual hematologic cancers or even cytopenias, suggesting that more time and additional DNA damaging events were needed to transform the clonal hematopoiesis findings to clinically relevant diseases,” Dr. Oh, clinical professor of medicine, said in an interview.

Nevertheless, “if a patient is found on testing to have clonal hematopoiesis, they should be screened more closely for blood disorders and cardiovascular issues than they might otherwise be, though this remains an area of active investigation,” Dr. Oh said.

Dr. Nolan had no disclosures to report. Dr. Oh is the chief medical science officer at Sema4, a genomic testing and data company. 

First responders exposed to toxic dusts and fibers in the aftermath of the World Trade Center (WTC) terror attacks show increased levels of clonal hematopoiesis linked to the development of blood cancers, new research finds. These results add to concerns about the long-term health effects of that exposure and further underscore a need for screening of those exposed.

“These data demonstrate that environmental exposure to the WTC disaster site is associated with a higher burden of clonal hematopoiesis, exceeding that expected in normal aging, and establish a rationale for mutational testing of the larger WTC-exposed population,” report the authors in the study, published March 7 in Nature Medicine.

The findings come from a study of blood samples from WTC first responders, including 429 firefighters and 52 emergency medical service workers, collected between December 2013 and October 2015.

For comparisons, the authors collected blood samples from 255 firefighters from in and around Nashville, Tenn., none of whom had been exposed to the 9/11 disaster.

Genetic analysis of the samples showed that 10% of those in the WTC-exposed cohort (n = 48) had unique somatic mutations considered to likely be pathogenic, and six of those individuals carried one or more of the mutations.

After a multivariate adjustment controlling for age, sex and race/ethnicity, those among the WTC-exposed first responders had a significantly increased odds of clonal hematopoiesis versus nonexposed workers (odds ratio [OR] = 3.14; P = .0006).

The higher risk was further observed in a comparison limited only to the WTC-exposed firefighters versus nonexposed firefighters (OR = 2.93; P = .0014) after the multivariate adjustment. The greater association between WTC exposure and clonal hematopoiesis remained after the researchers controlled for smoking as well as other risk factors among the WTC-exposed group overall (OR = 3.05; P = .0015) and the firefighters-only comparison (OR = 2.78; P = .004).

A history of smoking was not significantly associated with an increased risk of clonal hematopoiesis in either model.

As a risk factor for hematologic malignancy, cardiovascular events, and mortality, “clonal hematopoiesis is a concerning acquired risk not only for diseases that are already associated with WTC exposure but also as the population ages, this may exacerbate their risk profile,” Dr. Anna Nolan, coauthor of the study, and professor of medicine and environmental medicine in the division of pulmonary and critical care, New York University, said in an interview.

The most common gene mutations observed in the WTC-exposed group were those associated with myeloid malignancies, such as chronic myeloid leukemia; however, blood counts in the exposed group showed no association between exposure and mutations linked to cytopenias.

A further analysis on mice, investigating how WTC particulate matter uniquely affects DNA, surprisingly showed that just one exposure to the material was associated with clonal hematopoietic changes.

Courtesy NYU Langone Health

“Exposure to particulates, even at a single time point, can yield clonal mutations that may be risk for multisystem end-organ changes,” Dr. Nolan said.

While the serious health effects of WTC exposure on humans, have been extensively documented, including a study published in February showing increases in skin, prostate and thyroid cancers, clonal hematopoiesis suggests further heightened risks as the exposed population grows older, Dr. Nolan noted.

“[Clonal hematopoiesis] is a concerning acquired risk not only for diseases that are already associated with WTC exposure, but also, as the population ages, this may exacerbate their risk profile,” she said.

Due to the risk, “clinicians should be aware that WTC-exposed first responders have had a significant exposure and that they are at risk for developing several conditions.”

Commenting on this study, William K. Oh, MD, whose team at the Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, has reported in a previous study on the increased risk of prostate cancer among WTC first responders, noted that more time may be necessary to better understand the full effects of the increases in clonal hematopoiesis.

“Though these findings are of concern, there were still no differences in the cohorts in actual hematologic cancers or even cytopenias, suggesting that more time and additional DNA damaging events were needed to transform the clonal hematopoiesis findings to clinically relevant diseases,” Dr. Oh, clinical professor of medicine, said in an interview.

Nevertheless, “if a patient is found on testing to have clonal hematopoiesis, they should be screened more closely for blood disorders and cardiovascular issues than they might otherwise be, though this remains an area of active investigation,” Dr. Oh said.

Dr. Nolan had no disclosures to report. Dr. Oh is the chief medical science officer at Sema4, a genomic testing and data company. 

First responders exposed to toxic dusts and fibers in the aftermath of the World Trade Center (WTC) terror attacks show increased levels of clonal hematopoiesis linked to the development of blood cancers, new research finds. These results add to concerns about the long-term health effects of that exposure and further underscore a need for screening of those exposed.

“These data demonstrate that environmental exposure to the WTC disaster site is associated with a higher burden of clonal hematopoiesis, exceeding that expected in normal aging, and establish a rationale for mutational testing of the larger WTC-exposed population,” report the authors in the study, published March 7 in Nature Medicine.

The findings come from a study of blood samples from WTC first responders, including 429 firefighters and 52 emergency medical service workers, collected between December 2013 and October 2015.

For comparisons, the authors collected blood samples from 255 firefighters from in and around Nashville, Tenn., none of whom had been exposed to the 9/11 disaster.

Genetic analysis of the samples showed that 10% of those in the WTC-exposed cohort (n = 48) had unique somatic mutations considered to likely be pathogenic, and six of those individuals carried one or more of the mutations.

After a multivariate adjustment controlling for age, sex and race/ethnicity, those among the WTC-exposed first responders had a significantly increased odds of clonal hematopoiesis versus nonexposed workers (odds ratio [OR] = 3.14; P = .0006).

The higher risk was further observed in a comparison limited only to the WTC-exposed firefighters versus nonexposed firefighters (OR = 2.93; P = .0014) after the multivariate adjustment. The greater association between WTC exposure and clonal hematopoiesis remained after the researchers controlled for smoking as well as other risk factors among the WTC-exposed group overall (OR = 3.05; P = .0015) and the firefighters-only comparison (OR = 2.78; P = .004).

A history of smoking was not significantly associated with an increased risk of clonal hematopoiesis in either model.

As a risk factor for hematologic malignancy, cardiovascular events, and mortality, “clonal hematopoiesis is a concerning acquired risk not only for diseases that are already associated with WTC exposure but also as the population ages, this may exacerbate their risk profile,” Dr. Anna Nolan, coauthor of the study, and professor of medicine and environmental medicine in the division of pulmonary and critical care, New York University, said in an interview.

The most common gene mutations observed in the WTC-exposed group were those associated with myeloid malignancies, such as chronic myeloid leukemia; however, blood counts in the exposed group showed no association between exposure and mutations linked to cytopenias.

A further analysis on mice, investigating how WTC particulate matter uniquely affects DNA, surprisingly showed that just one exposure to the material was associated with clonal hematopoietic changes.

Courtesy NYU Langone Health

“Exposure to particulates, even at a single time point, can yield clonal mutations that may be risk for multisystem end-organ changes,” Dr. Nolan said.

While the serious health effects of WTC exposure on humans, have been extensively documented, including a study published in February showing increases in skin, prostate and thyroid cancers, clonal hematopoiesis suggests further heightened risks as the exposed population grows older, Dr. Nolan noted.

“[Clonal hematopoiesis] is a concerning acquired risk not only for diseases that are already associated with WTC exposure, but also, as the population ages, this may exacerbate their risk profile,” she said.

Due to the risk, “clinicians should be aware that WTC-exposed first responders have had a significant exposure and that they are at risk for developing several conditions.”

Commenting on this study, William K. Oh, MD, whose team at the Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, has reported in a previous study on the increased risk of prostate cancer among WTC first responders, noted that more time may be necessary to better understand the full effects of the increases in clonal hematopoiesis.

“Though these findings are of concern, there were still no differences in the cohorts in actual hematologic cancers or even cytopenias, suggesting that more time and additional DNA damaging events were needed to transform the clonal hematopoiesis findings to clinically relevant diseases,” Dr. Oh, clinical professor of medicine, said in an interview.

Nevertheless, “if a patient is found on testing to have clonal hematopoiesis, they should be screened more closely for blood disorders and cardiovascular issues than they might otherwise be, though this remains an area of active investigation,” Dr. Oh said.

Dr. Nolan had no disclosures to report. Dr. Oh is the chief medical science officer at Sema4, a genomic testing and data company. 

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

Tremors and memory symptoms were identified among individuals in a primary care setting as early as 10 years before a Parkinson’s disease diagnosis in a new study.

Most research on the causes and early signs of Parkinson’s disease (PD) have involved patients of Northern European ancestry, Cristina Simonet, MD, of Queen Mary University of London, and colleagues wrote in their paper, published in JAMA Neurology.

Additionally, data on how PD might manifest in different ethnic groups are limited, they said.

In their nested case-control, the researchers examined data from electronic health records of an ethnically diverse population of 1,016,277 adults seen in primary care practices between 1990 and Feb. 6, 2018. They compared individuals with PD with those without PD or other neurologic conditions.

The researchers identified 10 age and sex-matched controls for each PD case, and also conducted an unmatched analysis after adjusting for age and sex. The final study population included 1,055 patients with PD and 1,009,523 controls. The population of PD cases was 15.7% Black, 19.7% South Asian, 50.9% White, and 8.3% other; the population of controls was 13.3% Black, 21.5% South Asian, 43.7% White, and 11.3% other.

“We observed a constellation of symptoms noted by general practitioners up to a decade before diagnosis of PD,” the researchers said. Symptoms were identified across three time intervals (less than 2 years, 2-5 years, and 5-10 years before diagnosis) to better evaluate exposure outcome associations.

In the matched analysis of midlife risk factors, epilepsy showed the strongest association with PD diagnosis across all time periods, and type 2 diabetes or hypertension 5-10 years before diagnosis was associated with later PD.

Prediagnostic signs of PD included both motor and nonmotor manifestations.

The matched analysis revealed a significant increased association between tremor and memory symptoms less than 2 years before diagnosis (adjusted odds ratios of 151.24 and 8.73, respectively) as well as up to 10 years before diagnosis for tremors and up to 5 years for memory symptoms (aOR, 11.4 and 3.09, respectively) in PD patients, compared with controls.

Other strong associations between PD and early nonmotor features in cases, compared with controls, included hypotension (aOR, 6.81), constipation (aOR, 3.29), and depression (aOR, 4.61).

In addition, the researchers found associations for epilepsy that had not been identified in previous studies, and these associations persisted in a replication analysis.

The study findings were limited by several factors, mainly the use of routine primary care data with underascertained factors of interest, and potential mislabeling of PD, the researchers noted. Other limitations included the lack of data on prescription medication for PD, and the recording of memory problems in primary care without supportive testing to confirm cognitive impairment.

The results support a range of comorbidities and symptoms that may present in primary care, and clinicians should consider PD as a possible cause, the researchers wrote.
 

Make early referral a priority

The study is important because of the lack of diversity in Parkinson’s disease research, lead author Dr. Simonet said in an interview.

“Over the last decade, the global population suffering from Parkinson’s disease has more than doubled,” she said. Causes may include the increasing numbers of older people with longer life expectancy. “However, it seems there are other factors, including environmental, genetic, and lifestyle, that might play a role in increasing the prevalence of Parkinson’s disease.”

“More representative studies, including minority ethnic groups and those living in areas of high social and economic deprivation, are needed,” Dr. Simonet emphasized.

She said that there is little research on the association with epilepsy and hearing loss in early PD, and “for that reason, our results should encourage further studies to confirm a possible link between these manifestations and Parkinson’s disease.”
 

Early detection may drive better diagnoses

The current study is important for understanding the prediagnostic features and risk factors that may allow for earlier detection of Parkinson’s disease, William Hung, MD, a geriatrics and palliative care specialist of the Icahn School of Medicine at Mount Sinai, New York, said in an interview. “Prior to this study, there was limited understanding of these features.

“One surprise [in the findings] was that ethnicity and socioeconomic deprivation do not appear to be associated with the risk of PD, in contrast to other illnesses such as dementia,” said Dr. Hung. “The array of prediagnostic features associated with PD is not surprising, but nonetheless important for clinicians to know to consider whether PD could be the underlying cause.”

The take-home message for primary care is that “there are features, such as hearing loss, history of epilepsy, autonomic symptoms, motor symptoms, among others, for which clinicians should consider PD as part of the differential diagnosis as underlying cause and consider referral to specialists for diagnostic clarification,” said Dr. Hung.

“Additional research is needed to translate these findings to care, perhaps developing decision aids, interventions that may help with diagnosis and evaluation,” as is work on understanding the link between PD and symptoms such as hearing loss and epilepsy, he said.
 

Primary care offers opportunity to identify risk factors

The current study represents an important step in early recognition of PD, with implications for helping patients access treatments promptly and improve their quality of life, Bhavana Patel, DO, Shannon Chiu, MD, and Melissa J. Armstrong, MD, of the University of Florida, Gainesville, wrote in an accompanying editorial.

“The primary care setting is commonly where symptoms heralding the onset of PD are first discussed. However, little is known regarding the prediagnostic manifestations of PD that are seen in primary care clinics, particularly in underserved populations,” they wrote.

The study included many risk factors and prodromal markers associated with research criteria for prodromal PD, but did not include several risk and prodromal markers in the Movement Disorders Society research criteria, “such as symptoms suggestive of REM sleep behavior disorder, excessive daytime sleepiness (which overlaps with, but is distinct from, fatigue), urinary dysfunction, pesticide and solvent exposure, caffeine use, level of physical activity, and family history,” they said.

Even in individuals with diagnosed PD, certain symptoms, particularly nonmotor symptoms, are commonly underreported,” and primary care clinicians may not recognize these symptoms as PD risk factors, the authors noted.

However, “in addition to contributing to possible models of modifiable risk factors for PD, study results may also further inform algorithms designed to predict PD diagnoses in primary care,” they said. The study also highlights the need for more multivariable models to better identify PD risk factors and strategies for early identification of PD in primary care.

Several study coauthors received funding related to the study from Barts Charity, Health Data Research UK, the Department of Health and Social Care (England) and the devolved administrations, and leading medical research charities, as well as the National Institute for Health Research UCLH Biomedical Research Centre. Lead author Dr. Simonet and Dr. Hung had no financial conflicts to disclose. Dr. Patel disclosed support from the National Institute on Aging, the Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia, and the American Brain Foundation and the Mary E. Groff Charitable Trust. Dr. Chiu reported receiving grants from Mangurian-Fixel-McKnight Collaboration for Pilot Studies in Lewy Body Dementia and the Smallwood Foundation. Dr. Armstrong disclosed funding from the National Institute on Aging, the Florida Department of Health, the Lewy Body Dementia Association, the Alzheimer’s Therapeutic Research Institute/Alzheimer’s Clinical Trial Consortium, the Alzheimer’s Disease Cooperative Study as Data Safety Monitoring Board the Parkinson’s Foundation, and the American Academy of Neurology.

Among children and adolescents aged 5-18 years, concussion was associated with a higher risk of mental health problems, compared with age- and sex-matched children and adolescents with an orthopedic injury, according to a cohort study published in JAMA Network Open.

While concussions are one of the most common head injuries in the pediatric population, the extent to which they increase the risk of new onset psychiatric disorders or subsequent psychopathology is unclear, lead author Andrée-Anne Ledoux, PhD, of the Children’s Hospital of Eastern Ontario Research Institute, Ottawa, and colleagues explained.

The researchers conducted a population-based retrospective cohort study to evaluate associations between concussion and risk of subsequent mental health issues, psychiatric hospitalizations, self-harm, or suicides in children and adolescents, with follow-up ranging from 1 month to 10 years.

The data were obtained from province-wide health administrative databases. Participants with concussion were included in an exposed group, while those with an orthopedic injury were included in a 1:2 age- and sex-matched comparison group.
 

Results

The study cohort comprised 448,803 participants, including 152,321 and 296,482 children and adolescents with concussion and orthopedic injury, respectively.

The incidence rates of any mental health problem were 11,141 per 100,000 person-years in the exposed group and 7,960 per 100,000 person-years in the unexposed group (difference, 3,181; 95% confidence interval, 3,073-3,291 per 100,000 person-years).

After concussion, the exposed group had a greater risk of developing a mental health issue (adjusted hazard ratio, 1.39; 95% CI, 1.37-1.40), psychiatric hospitalization (aHR, 1.47; 95% CI, 1.41-1.53), and self-harm (aHR, 1.49; 95% CI, 1.42-1.56). In addition, there was no significant difference in death by suicide between the exposed and unexposed groups (HR, 1.54; 95% CI, 0.90-2.61).

“Our results suggest that clinicians should assess for preexisting and new mental health symptoms throughout concussion recovery and treat mental health conditions or symptoms or refer the patient to a specialist in pediatric mental health,” wrote Dr. Ledoux and colleagues. “[Clinicians should also] assess suicidal ideation and self-harm behaviors during evaluation and follow-up visits for concussion.”

The researchers acknowledged that a key limitation of the study was the retrospective observational design. In addition, the identification of exposures using diagnostic billing codes could have introduced exposure or outcome misclassification.
 

Expert-recommended resources

“For more information, I’d recommend ‘Pedsconcussion,’ which are evidence-based living guidelines for pediatric concussion care,” Dr. Ledoux said in an interview. “Within domain 8, there are specific guidelines related to the management of mental health issues post concussion.”

Neuropsychology expert Talin Babikian, PhD, of the University of California, Los Angeles, commented: “Studies have shown that even a single psychoeducational session early after a concussion can minimize prolonged recoveries. Ensuring all stakeholders (family, clinicians, school, coach, peers) are on the same page and providing the same information is important to build trust and a sense of safety and agency.

“We want to provide psychoeducation early in the process to avoid unnecessary fear and avoidance. We also want to curtail misattribution of everyday symptoms or symptoms related to an unrelated condition to a brain injury, which are easier to do when caught early,” Dr. Babikian added.

This study was supported by the Institute for Clinical Evaluative Sciences, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-term Care. One author reported financial relationships with the University of Ottawa, the National Football League, Parachute Canada, and 360 Concussion Care, an interdisciplinary concussion clinic; no other conflicts of interest were reported.

Among children and adolescents aged 5-18 years, concussion was associated with a higher risk of mental health problems, compared with age- and sex-matched children and adolescents with an orthopedic injury, according to a cohort study published in JAMA Network Open.

While concussions are one of the most common head injuries in the pediatric population, the extent to which they increase the risk of new onset psychiatric disorders or subsequent psychopathology is unclear, lead author Andrée-Anne Ledoux, PhD, of the Children’s Hospital of Eastern Ontario Research Institute, Ottawa, and colleagues explained.

The researchers conducted a population-based retrospective cohort study to evaluate associations between concussion and risk of subsequent mental health issues, psychiatric hospitalizations, self-harm, or suicides in children and adolescents, with follow-up ranging from 1 month to 10 years.

The data were obtained from province-wide health administrative databases. Participants with concussion were included in an exposed group, while those with an orthopedic injury were included in a 1:2 age- and sex-matched comparison group.
 

Results

The study cohort comprised 448,803 participants, including 152,321 and 296,482 children and adolescents with concussion and orthopedic injury, respectively.

The incidence rates of any mental health problem were 11,141 per 100,000 person-years in the exposed group and 7,960 per 100,000 person-years in the unexposed group (difference, 3,181; 95% confidence interval, 3,073-3,291 per 100,000 person-years).

After concussion, the exposed group had a greater risk of developing a mental health issue (adjusted hazard ratio, 1.39; 95% CI, 1.37-1.40), psychiatric hospitalization (aHR, 1.47; 95% CI, 1.41-1.53), and self-harm (aHR, 1.49; 95% CI, 1.42-1.56). In addition, there was no significant difference in death by suicide between the exposed and unexposed groups (HR, 1.54; 95% CI, 0.90-2.61).

“Our results suggest that clinicians should assess for preexisting and new mental health symptoms throughout concussion recovery and treat mental health conditions or symptoms or refer the patient to a specialist in pediatric mental health,” wrote Dr. Ledoux and colleagues. “[Clinicians should also] assess suicidal ideation and self-harm behaviors during evaluation and follow-up visits for concussion.”

The researchers acknowledged that a key limitation of the study was the retrospective observational design. In addition, the identification of exposures using diagnostic billing codes could have introduced exposure or outcome misclassification.
 

Expert-recommended resources

“For more information, I’d recommend ‘Pedsconcussion,’ which are evidence-based living guidelines for pediatric concussion care,” Dr. Ledoux said in an interview. “Within domain 8, there are specific guidelines related to the management of mental health issues post concussion.”

Neuropsychology expert Talin Babikian, PhD, of the University of California, Los Angeles, commented: “Studies have shown that even a single psychoeducational session early after a concussion can minimize prolonged recoveries. Ensuring all stakeholders (family, clinicians, school, coach, peers) are on the same page and providing the same information is important to build trust and a sense of safety and agency.

“We want to provide psychoeducation early in the process to avoid unnecessary fear and avoidance. We also want to curtail misattribution of everyday symptoms or symptoms related to an unrelated condition to a brain injury, which are easier to do when caught early,” Dr. Babikian added.

This study was supported by the Institute for Clinical Evaluative Sciences, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-term Care. One author reported financial relationships with the University of Ottawa, the National Football League, Parachute Canada, and 360 Concussion Care, an interdisciplinary concussion clinic; no other conflicts of interest were reported.

Among children and adolescents aged 5-18 years, concussion was associated with a higher risk of mental health problems, compared with age- and sex-matched children and adolescents with an orthopedic injury, according to a cohort study published in JAMA Network Open.

While concussions are one of the most common head injuries in the pediatric population, the extent to which they increase the risk of new onset psychiatric disorders or subsequent psychopathology is unclear, lead author Andrée-Anne Ledoux, PhD, of the Children’s Hospital of Eastern Ontario Research Institute, Ottawa, and colleagues explained.

The researchers conducted a population-based retrospective cohort study to evaluate associations between concussion and risk of subsequent mental health issues, psychiatric hospitalizations, self-harm, or suicides in children and adolescents, with follow-up ranging from 1 month to 10 years.

The data were obtained from province-wide health administrative databases. Participants with concussion were included in an exposed group, while those with an orthopedic injury were included in a 1:2 age- and sex-matched comparison group.
 

Results

The study cohort comprised 448,803 participants, including 152,321 and 296,482 children and adolescents with concussion and orthopedic injury, respectively.

The incidence rates of any mental health problem were 11,141 per 100,000 person-years in the exposed group and 7,960 per 100,000 person-years in the unexposed group (difference, 3,181; 95% confidence interval, 3,073-3,291 per 100,000 person-years).

After concussion, the exposed group had a greater risk of developing a mental health issue (adjusted hazard ratio, 1.39; 95% CI, 1.37-1.40), psychiatric hospitalization (aHR, 1.47; 95% CI, 1.41-1.53), and self-harm (aHR, 1.49; 95% CI, 1.42-1.56). In addition, there was no significant difference in death by suicide between the exposed and unexposed groups (HR, 1.54; 95% CI, 0.90-2.61).

“Our results suggest that clinicians should assess for preexisting and new mental health symptoms throughout concussion recovery and treat mental health conditions or symptoms or refer the patient to a specialist in pediatric mental health,” wrote Dr. Ledoux and colleagues. “[Clinicians should also] assess suicidal ideation and self-harm behaviors during evaluation and follow-up visits for concussion.”

The researchers acknowledged that a key limitation of the study was the retrospective observational design. In addition, the identification of exposures using diagnostic billing codes could have introduced exposure or outcome misclassification.
 

Expert-recommended resources

“For more information, I’d recommend ‘Pedsconcussion,’ which are evidence-based living guidelines for pediatric concussion care,” Dr. Ledoux said in an interview. “Within domain 8, there are specific guidelines related to the management of mental health issues post concussion.”

Neuropsychology expert Talin Babikian, PhD, of the University of California, Los Angeles, commented: “Studies have shown that even a single psychoeducational session early after a concussion can minimize prolonged recoveries. Ensuring all stakeholders (family, clinicians, school, coach, peers) are on the same page and providing the same information is important to build trust and a sense of safety and agency.

“We want to provide psychoeducation early in the process to avoid unnecessary fear and avoidance. We also want to curtail misattribution of everyday symptoms or symptoms related to an unrelated condition to a brain injury, which are easier to do when caught early,” Dr. Babikian added.

This study was supported by the Institute for Clinical Evaluative Sciences, which is funded by an annual grant from the Ontario Ministry of Health and the Ministry of Long-term Care. One author reported financial relationships with the University of Ottawa, the National Football League, Parachute Canada, and 360 Concussion Care, an interdisciplinary concussion clinic; no other conflicts of interest were reported.

Pregnant women with a history of spontaneous abortion had a significantly increased risk of gestational diabetes in subsequent pregnancies, based on data from more than 100,000 women.

Gestational diabetes is associated not only with adverse perinatal outcomes, but also with an increased risk of long-term cardiovascular and metabolic health issues in mothers and children, wrote Yan Zhao, PhD, of Tongji University, Shanghai, and colleagues.

Previous studies also have shown that spontaneous abortion (SAB) is associated with later maternal risk of cardiovascular disease and venous thromboembolism, the researchers said. The same mechanisms might contribute to the development of gestational diabetes, but the association between abortion history and gestational diabetes risk in subsequent pregnancies remains unclear, they added.

In a study published in JAMA Network Open, the researchers identified 102,259 pregnant women seen for routine prenatal care at a single hospital in Shanghai between January 2014 and December 2019. The mean age of the women was 29.8 years.

During the study period, 14,579 women experienced SAB (14.3%), 17,935 experienced induced abortion (17.5%), and 4,017 experienced both (11.9%).

In all, 12,153 cases of gestational diabetes were identified, for a prevalence of 11.9%. The relative risk of gestational diabetes was 1.25 for women who experienced SAB and 1.15 for those who experienced both SAB and induced abortion, and the association between SAB and gestational diabetes increased in a number-dependent manner, the researchers said. The increase in relative risk for gestational diabetes in pregnant women with one SAB, two SABs, and three or more SABs was 18%, 41%, and 43%, compared to pregnant women with no SAB history.

However, no association appeared between a history of induced abortion and gestational diabetes, the researchers said. “To date, no study has reported the association of prior induced abortion with gestational diabetes,” they wrote.

The study findings were limited by several factors including the reliance on self-reports for history of SAB and therefore possible underreporting, the researchers noted. Other limitations included the lack of data on the timing of SABs; therefore, the time between SAB and gestational diabetes diagnosis could not be included in the analysis, they said. Unknown variables and the inclusion only of women from a single city in China might limit the generalizability of the results, they added.

More research is needed to understand the biological mechanisms behind the association between SAB and gestational diabetes, an association that has potential public health implications, they noted. However, the results suggest that “pregnant women with a history of SAB, especially those with a history of recurrent SAB, should attend more antenatal visits to monitor their blood glucose and implement early prevention and intervention,” such as healthful eating and regular exercise, they wrote.
 

Findings confirm, not surprise

The diagnosis of gestational diabetes in the current study “was made with a slightly different test than we typically use in the United States – a 1-hour nonfasting glucola followed by a confirmatory 3-hour fasting glucola,” Sarah W. Prager, MD, of the University of Washington, Seattle, said in an interview. The current study of both SAB and gestational diabetes is important because both conditions are very common and have been the focus of increased attention in the popular media and in scientific study, she said.

Dr. Prager said she was not surprised by the findings of a link between a history of gestational diabetes and a history of SAB, “but the association is likely that people at risk for gestational diabetes or who have undiagnosed diabetes/glucose intolerance are more likely to experience SAB,” she noted. “I would be surprised if the direction of the association is that SAB puts people at risk for gestational diabetes; more likely undiagnosed diabetes is a risk factor for SAB,” she added. “Perhaps we should be screening for glucose intolerance and other metabolic disorders more frequently in people who have especially recurrent SAB, as the more miscarriages someone had, the more likely they were in this study to be diagnosed with gestational diabetes;” or perhaps those with a history of SAB/recurrent SAB should be screened closer to 24 weeks’ than 28 weeks’ gestation to enable earlier intervention in those more likely to have gestational diabetes, Dr. Prager said.

The study was supported by the Key Program of the National Natural Science Foundation of China, the National Natural Science Foundation of China, the National Key Research and Development Program of China, the Shanghai Municipal Medical and Health Discipline Construction Projects, and the Shanghai Rising-Star Program. The researchers and Dr. Prager had no financial conflicts to disclose. Dr. Prager serves on the editorial advisory board of Ob.Gyn. News.

Pregnant women with a history of spontaneous abortion had a significantly increased risk of gestational diabetes in subsequent pregnancies, based on data from more than 100,000 women.

Gestational diabetes is associated not only with adverse perinatal outcomes, but also with an increased risk of long-term cardiovascular and metabolic health issues in mothers and children, wrote Yan Zhao, PhD, of Tongji University, Shanghai, and colleagues.

Previous studies also have shown that spontaneous abortion (SAB) is associated with later maternal risk of cardiovascular disease and venous thromboembolism, the researchers said. The same mechanisms might contribute to the development of gestational diabetes, but the association between abortion history and gestational diabetes risk in subsequent pregnancies remains unclear, they added.

In a study published in JAMA Network Open, the researchers identified 102,259 pregnant women seen for routine prenatal care at a single hospital in Shanghai between January 2014 and December 2019. The mean age of the women was 29.8 years.

During the study period, 14,579 women experienced SAB (14.3%), 17,935 experienced induced abortion (17.5%), and 4,017 experienced both (11.9%).

In all, 12,153 cases of gestational diabetes were identified, for a prevalence of 11.9%. The relative risk of gestational diabetes was 1.25 for women who experienced SAB and 1.15 for those who experienced both SAB and induced abortion, and the association between SAB and gestational diabetes increased in a number-dependent manner, the researchers said. The increase in relative risk for gestational diabetes in pregnant women with one SAB, two SABs, and three or more SABs was 18%, 41%, and 43%, compared to pregnant women with no SAB history.

However, no association appeared between a history of induced abortion and gestational diabetes, the researchers said. “To date, no study has reported the association of prior induced abortion with gestational diabetes,” they wrote.

The study findings were limited by several factors including the reliance on self-reports for history of SAB and therefore possible underreporting, the researchers noted. Other limitations included the lack of data on the timing of SABs; therefore, the time between SAB and gestational diabetes diagnosis could not be included in the analysis, they said. Unknown variables and the inclusion only of women from a single city in China might limit the generalizability of the results, they added.

More research is needed to understand the biological mechanisms behind the association between SAB and gestational diabetes, an association that has potential public health implications, they noted. However, the results suggest that “pregnant women with a history of SAB, especially those with a history of recurrent SAB, should attend more antenatal visits to monitor their blood glucose and implement early prevention and intervention,” such as healthful eating and regular exercise, they wrote.
 

Findings confirm, not surprise

The diagnosis of gestational diabetes in the current study “was made with a slightly different test than we typically use in the United States – a 1-hour nonfasting glucola followed by a confirmatory 3-hour fasting glucola,” Sarah W. Prager, MD, of the University of Washington, Seattle, said in an interview. The current study of both SAB and gestational diabetes is important because both conditions are very common and have been the focus of increased attention in the popular media and in scientific study, she said.

Dr. Prager said she was not surprised by the findings of a link between a history of gestational diabetes and a history of SAB, “but the association is likely that people at risk for gestational diabetes or who have undiagnosed diabetes/glucose intolerance are more likely to experience SAB,” she noted. “I would be surprised if the direction of the association is that SAB puts people at risk for gestational diabetes; more likely undiagnosed diabetes is a risk factor for SAB,” she added. “Perhaps we should be screening for glucose intolerance and other metabolic disorders more frequently in people who have especially recurrent SAB, as the more miscarriages someone had, the more likely they were in this study to be diagnosed with gestational diabetes;” or perhaps those with a history of SAB/recurrent SAB should be screened closer to 24 weeks’ than 28 weeks’ gestation to enable earlier intervention in those more likely to have gestational diabetes, Dr. Prager said.

The study was supported by the Key Program of the National Natural Science Foundation of China, the National Natural Science Foundation of China, the National Key Research and Development Program of China, the Shanghai Municipal Medical and Health Discipline Construction Projects, and the Shanghai Rising-Star Program. The researchers and Dr. Prager had no financial conflicts to disclose. Dr. Prager serves on the editorial advisory board of Ob.Gyn. News.

Pregnant women with a history of spontaneous abortion had a significantly increased risk of gestational diabetes in subsequent pregnancies, based on data from more than 100,000 women.

Gestational diabetes is associated not only with adverse perinatal outcomes, but also with an increased risk of long-term cardiovascular and metabolic health issues in mothers and children, wrote Yan Zhao, PhD, of Tongji University, Shanghai, and colleagues.

Previous studies also have shown that spontaneous abortion (SAB) is associated with later maternal risk of cardiovascular disease and venous thromboembolism, the researchers said. The same mechanisms might contribute to the development of gestational diabetes, but the association between abortion history and gestational diabetes risk in subsequent pregnancies remains unclear, they added.

In a study published in JAMA Network Open, the researchers identified 102,259 pregnant women seen for routine prenatal care at a single hospital in Shanghai between January 2014 and December 2019. The mean age of the women was 29.8 years.

During the study period, 14,579 women experienced SAB (14.3%), 17,935 experienced induced abortion (17.5%), and 4,017 experienced both (11.9%).

In all, 12,153 cases of gestational diabetes were identified, for a prevalence of 11.9%. The relative risk of gestational diabetes was 1.25 for women who experienced SAB and 1.15 for those who experienced both SAB and induced abortion, and the association between SAB and gestational diabetes increased in a number-dependent manner, the researchers said. The increase in relative risk for gestational diabetes in pregnant women with one SAB, two SABs, and three or more SABs was 18%, 41%, and 43%, compared to pregnant women with no SAB history.

However, no association appeared between a history of induced abortion and gestational diabetes, the researchers said. “To date, no study has reported the association of prior induced abortion with gestational diabetes,” they wrote.

The study findings were limited by several factors including the reliance on self-reports for history of SAB and therefore possible underreporting, the researchers noted. Other limitations included the lack of data on the timing of SABs; therefore, the time between SAB and gestational diabetes diagnosis could not be included in the analysis, they said. Unknown variables and the inclusion only of women from a single city in China might limit the generalizability of the results, they added.

More research is needed to understand the biological mechanisms behind the association between SAB and gestational diabetes, an association that has potential public health implications, they noted. However, the results suggest that “pregnant women with a history of SAB, especially those with a history of recurrent SAB, should attend more antenatal visits to monitor their blood glucose and implement early prevention and intervention,” such as healthful eating and regular exercise, they wrote.
 

Findings confirm, not surprise

The diagnosis of gestational diabetes in the current study “was made with a slightly different test than we typically use in the United States – a 1-hour nonfasting glucola followed by a confirmatory 3-hour fasting glucola,” Sarah W. Prager, MD, of the University of Washington, Seattle, said in an interview. The current study of both SAB and gestational diabetes is important because both conditions are very common and have been the focus of increased attention in the popular media and in scientific study, she said.

Dr. Prager said she was not surprised by the findings of a link between a history of gestational diabetes and a history of SAB, “but the association is likely that people at risk for gestational diabetes or who have undiagnosed diabetes/glucose intolerance are more likely to experience SAB,” she noted. “I would be surprised if the direction of the association is that SAB puts people at risk for gestational diabetes; more likely undiagnosed diabetes is a risk factor for SAB,” she added. “Perhaps we should be screening for glucose intolerance and other metabolic disorders more frequently in people who have especially recurrent SAB, as the more miscarriages someone had, the more likely they were in this study to be diagnosed with gestational diabetes;” or perhaps those with a history of SAB/recurrent SAB should be screened closer to 24 weeks’ than 28 weeks’ gestation to enable earlier intervention in those more likely to have gestational diabetes, Dr. Prager said.

The study was supported by the Key Program of the National Natural Science Foundation of China, the National Natural Science Foundation of China, the National Key Research and Development Program of China, the Shanghai Municipal Medical and Health Discipline Construction Projects, and the Shanghai Rising-Star Program. The researchers and Dr. Prager had no financial conflicts to disclose. Dr. Prager serves on the editorial advisory board of Ob.Gyn. News.