Pulmonary Health Hub

The U.S. Preventive Services Task Force has issued a draft recommendation opposing screening for obstructive sleep apnea (OSA) in adults who are asymptomatic for the breathing disorder.

The USPSTF’s opposition is based on its determination that there is insufficient evidence to assess the balance of benefits and harms of screening for OSA in asymptomatic adults in primary care settings, giving the service an “I” grade. The recommendation and a draft evidence review are available for public comment until July 11 at 8:00 p.m. EST.

The draft recommendation is the first that the USPSTF has ever made about sleep apnea, according to the draft evidence review. The recommendation “applies to asymptomatic adults (aged 18 years and older) and adults with unrecognized symptoms of OSA.” It does not apply to children, adolescents, pregnant women, persons presenting with symptoms of or concerns about OSA, those who are being referred for evaluation or treatment of suspected OSA, and those who have acute conditions that could trigger the onset of OSA.

“Reported estimates of OSA prevalence vary due to differing definitions of OSA, sampling bias, and year of study publication. A 2013 systematic review reported an estimated prevalence of 2%-14% based on four community-based studies, while two U.S.-based studies conducted in the 1990s reported an estimated prevalence of 10% for mild OSA and 3.8%-6.5% for moderate or severe OSA,” according to the recommendation.

The USPSTF was unable to find adequate evidence on the direct harms of screening for OSA or the benefits of screening for OSA in asymptomatic populations, including their magnitude.

Most primary care clinicians do not routinely screen for OSA, according to the recommendation. While the Epworth Sleepiness Scale, STOP Questionnaire, STOPBang Questionnaire, Berlin Questionnaire, and Wisconsin Sleep Questionnaire are potential screening tests for OSA, none of these questionnaires has been validated in a primary care setting.

“There is uncertainty about the clinical utility of all potential screening tools,” and the USPSTF found no studies that prospectively evaluated screening questionnaires or clinical prediction tools to report calibration or clinical utility for improving health outcomes,” the draft evidence review said.

The USPSTF also found no studies evaluating the effect of screening for OSA on health outcomes or that directly evaluated benefits or harms of screening for OSA.

The recommendation calls for further research on the health outcomes of screening for OSA in asymptomatic persons and the role of sleepiness in determining health outcomes. The following are needed:

• The identification of valid and reliable clinical prediction tools that could accurately determine which asymptomatic persons (or persons with unrecognized symptoms) would benefit from further evaluation and testing for OSA.

• Studies that evaluate the effect of OSA treatments or interventions on health outcomes that are adequately powered and have an appropriate length of follow-up.

• Studies that evaluate whether improvement in the apnea-hypopnea index leads to improvement in health outcomes.

• More data on the natural history of mild sleep apnea.

The final evidence review will be used to inform the final USPSTF recommendation statement.

[email protected]

The U.S. Preventive Services Task Force has issued a draft recommendation opposing screening for obstructive sleep apnea (OSA) in adults who are asymptomatic for the breathing disorder.

The USPSTF’s opposition is based on its determination that there is insufficient evidence to assess the balance of benefits and harms of screening for OSA in asymptomatic adults in primary care settings, giving the service an “I” grade. The recommendation and a draft evidence review are available for public comment until July 11 at 8:00 p.m. EST.

The draft recommendation is the first that the USPSTF has ever made about sleep apnea, according to the draft evidence review. The recommendation “applies to asymptomatic adults (aged 18 years and older) and adults with unrecognized symptoms of OSA.” It does not apply to children, adolescents, pregnant women, persons presenting with symptoms of or concerns about OSA, those who are being referred for evaluation or treatment of suspected OSA, and those who have acute conditions that could trigger the onset of OSA.

“Reported estimates of OSA prevalence vary due to differing definitions of OSA, sampling bias, and year of study publication. A 2013 systematic review reported an estimated prevalence of 2%-14% based on four community-based studies, while two U.S.-based studies conducted in the 1990s reported an estimated prevalence of 10% for mild OSA and 3.8%-6.5% for moderate or severe OSA,” according to the recommendation.

The USPSTF was unable to find adequate evidence on the direct harms of screening for OSA or the benefits of screening for OSA in asymptomatic populations, including their magnitude.

Most primary care clinicians do not routinely screen for OSA, according to the recommendation. While the Epworth Sleepiness Scale, STOP Questionnaire, STOPBang Questionnaire, Berlin Questionnaire, and Wisconsin Sleep Questionnaire are potential screening tests for OSA, none of these questionnaires has been validated in a primary care setting.

“There is uncertainty about the clinical utility of all potential screening tools,” and the USPSTF found no studies that prospectively evaluated screening questionnaires or clinical prediction tools to report calibration or clinical utility for improving health outcomes,” the draft evidence review said.

The USPSTF also found no studies evaluating the effect of screening for OSA on health outcomes or that directly evaluated benefits or harms of screening for OSA.

The recommendation calls for further research on the health outcomes of screening for OSA in asymptomatic persons and the role of sleepiness in determining health outcomes. The following are needed:

• The identification of valid and reliable clinical prediction tools that could accurately determine which asymptomatic persons (or persons with unrecognized symptoms) would benefit from further evaluation and testing for OSA.

• Studies that evaluate the effect of OSA treatments or interventions on health outcomes that are adequately powered and have an appropriate length of follow-up.

• Studies that evaluate whether improvement in the apnea-hypopnea index leads to improvement in health outcomes.

• More data on the natural history of mild sleep apnea.

The final evidence review will be used to inform the final USPSTF recommendation statement.

[email protected]

The U.S. Preventive Services Task Force has issued a draft recommendation opposing screening for obstructive sleep apnea (OSA) in adults who are asymptomatic for the breathing disorder.

The USPSTF’s opposition is based on its determination that there is insufficient evidence to assess the balance of benefits and harms of screening for OSA in asymptomatic adults in primary care settings, giving the service an “I” grade. The recommendation and a draft evidence review are available for public comment until July 11 at 8:00 p.m. EST.

The draft recommendation is the first that the USPSTF has ever made about sleep apnea, according to the draft evidence review. The recommendation “applies to asymptomatic adults (aged 18 years and older) and adults with unrecognized symptoms of OSA.” It does not apply to children, adolescents, pregnant women, persons presenting with symptoms of or concerns about OSA, those who are being referred for evaluation or treatment of suspected OSA, and those who have acute conditions that could trigger the onset of OSA.

“Reported estimates of OSA prevalence vary due to differing definitions of OSA, sampling bias, and year of study publication. A 2013 systematic review reported an estimated prevalence of 2%-14% based on four community-based studies, while two U.S.-based studies conducted in the 1990s reported an estimated prevalence of 10% for mild OSA and 3.8%-6.5% for moderate or severe OSA,” according to the recommendation.

The USPSTF was unable to find adequate evidence on the direct harms of screening for OSA or the benefits of screening for OSA in asymptomatic populations, including their magnitude.

Most primary care clinicians do not routinely screen for OSA, according to the recommendation. While the Epworth Sleepiness Scale, STOP Questionnaire, STOPBang Questionnaire, Berlin Questionnaire, and Wisconsin Sleep Questionnaire are potential screening tests for OSA, none of these questionnaires has been validated in a primary care setting.

“There is uncertainty about the clinical utility of all potential screening tools,” and the USPSTF found no studies that prospectively evaluated screening questionnaires or clinical prediction tools to report calibration or clinical utility for improving health outcomes,” the draft evidence review said.

The USPSTF also found no studies evaluating the effect of screening for OSA on health outcomes or that directly evaluated benefits or harms of screening for OSA.

The recommendation calls for further research on the health outcomes of screening for OSA in asymptomatic persons and the role of sleepiness in determining health outcomes. The following are needed:

• The identification of valid and reliable clinical prediction tools that could accurately determine which asymptomatic persons (or persons with unrecognized symptoms) would benefit from further evaluation and testing for OSA.

• Studies that evaluate the effect of OSA treatments or interventions on health outcomes that are adequately powered and have an appropriate length of follow-up.

• Studies that evaluate whether improvement in the apnea-hypopnea index leads to improvement in health outcomes.

• More data on the natural history of mild sleep apnea.

The final evidence review will be used to inform the final USPSTF recommendation statement.

[email protected]

DENVER – Long-term continuous positive airway pressure (CPAP) for treatment of sleep apnea in patients with a recent mild stroke or transient ischemic attack resulted in improved cardiovascular and metabolic risk factors, better neurologic function, and a reduction in the recurrent vascular event rate, compared with usual care in the SLEEP TIGHT study.

“Up to 25% of patients will have a stroke, cardiovascular event, or death within 90 days after a minor stroke or TIA [transient ischemic attack] despite current preventive strategies. And, importantly, patients with a TIA or stroke have a high prevalence of obstructive sleep apnea – on the order of 60%-80%,” explained Dr. H. Klar Yaggi at the annual meeting of the Associated Professional Sleep Societies.

SLEEP TIGHT’s findings support the hypothesis that diagnosis and treatment of sleep apnea in patients with a recent minor stroke or TIA will address a major unmet need for better methods of reducing the high vascular risk present in this population, said Dr. Yaggi of Yale University in New Haven, Conn.

SLEEP TIGHT was a National Heart, Lung, and Blood Institute–sponsored phase II, 12-month, multicenter, single-blind, randomized, proof-of-concept study. It included 252 patients, 80% of whom had a recent minor stroke, the rest a TIA. These were patients with high levels of cardiovascular risk factors: two-thirds had hypertension, half were hyperlipidemic, 40% had diabetes, 15% had a prior MI, 10% had atrial fibrillation, and the group’s mean body mass index was 30 kg/m². Polysomnography revealed that 76% of subjects had sleep apnea as defined by an apnea-hypopnea index of at least 5 events per hour. In fact, they averaged about 23 events per hour, putting them in the moderate-severity range. As is common among stroke/TIA patients with sleep apnea, they experienced less daytime sleepiness than is typical in a sleep clinic population, with a mean baseline Epworth Sleepiness Scale score of 7.

Participants were randomized to one of three groups: a usual care control group, a CPAP arm, or an enhanced CPAP arm. The enhanced intervention protocol was designed to boost CPAP adherence; it included targeted education, a customized cognitive intervention, and additional CPAP support beyond the standard CPAP protocols used in sleep medicine clinics. Patients with sleep apnea in the two intervention arms were then placed on CPAP.

At 1 year of follow-up, the stroke rate was 8.7 per 100 patient-years in the usual care group, compared with 5.5 per 100 person-years in the combined intervention arms. The composite cardiovascular event rate, composed of all-cause mortality, acute MI, stroke, hospitalization for unstable angina, or urgent coronary revascularization, was 13.1 per 100 person-years with usual care and 11.0 in the CPAP intervention arms. While these results are encouraging, SLEEP TIGHT wasn’t powered to show significant differences in these hard events.

Outcomes across the board didn’t differ significantly between the CPAP and enhanced CPAP groups. And since the mean number of hours of CPAP use per night was also similar in the two groups – 3.9 hours with standard CPAP and 4.3 hours with enhanced CPAP – it’s likely that the phase III trial will rely upon the much simpler standard CPAP intervention, according to Dr. Yaggi.

He deemed CPAP adherence in this stroke/TIA population to be similar to the rates typically seen in routine sleep medicine practice. Roughly 40% of the stroke/TIA patients were rated as having good adherence, 30% made some use of the therapy, and 30% had no or poor adherence.

Nonetheless, patients in the two intervention arms did significantly better than the usual care group in terms of 1-year changes in insulin resistance and glycosylated hemoglobin. They also had lower 24-hour mean systolic blood pressure and were more likely to convert to a favorable pattern of nocturnal blood pressure dipping. However, no differences between the intervention and usual care groups were seen in levels of high-sensitivity C-reactive protein and interleukin-6, the two markers of systemic inflammation analyzed. Nor did the CPAP intervention provide any benefit in terms of heart rate variability and other measures of autonomic function.

Fifty-eight percent of patients in the intervention arms ended up with a desirable National Institutes of Health Stroke Scale score of 0-1, compared with 38% of the usual care group. In addition, daytime sleepiness as reflected in Epworth Sleepiness Scale scores was reduced at last follow-up to a significantly greater extent in the CPAP groups, Dr. Yaggi noted.

Greater CPAP use was associated with a favorable trend for improvement in the modified Rankin score, a measure of functional ability: a 0.3-point reduction with no or poor CPAP use, a 0.4-point decrease with some use, and a 0.9-point reduction with good use.

The encouraging results will be helpful in designing a planned much larger, event-driven, definitive phase III trial, Dr. Yaggi said.

Dr. Yaggi reported having no financial conflicts regarding this National Heart, Lung and Blood Institute-sponsored study.

[email protected]

DENVER – Long-term continuous positive airway pressure (CPAP) for treatment of sleep apnea in patients with a recent mild stroke or transient ischemic attack resulted in improved cardiovascular and metabolic risk factors, better neurologic function, and a reduction in the recurrent vascular event rate, compared with usual care in the SLEEP TIGHT study.

“Up to 25% of patients will have a stroke, cardiovascular event, or death within 90 days after a minor stroke or TIA [transient ischemic attack] despite current preventive strategies. And, importantly, patients with a TIA or stroke have a high prevalence of obstructive sleep apnea – on the order of 60%-80%,” explained Dr. H. Klar Yaggi at the annual meeting of the Associated Professional Sleep Societies.

SLEEP TIGHT’s findings support the hypothesis that diagnosis and treatment of sleep apnea in patients with a recent minor stroke or TIA will address a major unmet need for better methods of reducing the high vascular risk present in this population, said Dr. Yaggi of Yale University in New Haven, Conn.

SLEEP TIGHT was a National Heart, Lung, and Blood Institute–sponsored phase II, 12-month, multicenter, single-blind, randomized, proof-of-concept study. It included 252 patients, 80% of whom had a recent minor stroke, the rest a TIA. These were patients with high levels of cardiovascular risk factors: two-thirds had hypertension, half were hyperlipidemic, 40% had diabetes, 15% had a prior MI, 10% had atrial fibrillation, and the group’s mean body mass index was 30 kg/m². Polysomnography revealed that 76% of subjects had sleep apnea as defined by an apnea-hypopnea index of at least 5 events per hour. In fact, they averaged about 23 events per hour, putting them in the moderate-severity range. As is common among stroke/TIA patients with sleep apnea, they experienced less daytime sleepiness than is typical in a sleep clinic population, with a mean baseline Epworth Sleepiness Scale score of 7.

Participants were randomized to one of three groups: a usual care control group, a CPAP arm, or an enhanced CPAP arm. The enhanced intervention protocol was designed to boost CPAP adherence; it included targeted education, a customized cognitive intervention, and additional CPAP support beyond the standard CPAP protocols used in sleep medicine clinics. Patients with sleep apnea in the two intervention arms were then placed on CPAP.

At 1 year of follow-up, the stroke rate was 8.7 per 100 patient-years in the usual care group, compared with 5.5 per 100 person-years in the combined intervention arms. The composite cardiovascular event rate, composed of all-cause mortality, acute MI, stroke, hospitalization for unstable angina, or urgent coronary revascularization, was 13.1 per 100 person-years with usual care and 11.0 in the CPAP intervention arms. While these results are encouraging, SLEEP TIGHT wasn’t powered to show significant differences in these hard events.

Outcomes across the board didn’t differ significantly between the CPAP and enhanced CPAP groups. And since the mean number of hours of CPAP use per night was also similar in the two groups – 3.9 hours with standard CPAP and 4.3 hours with enhanced CPAP – it’s likely that the phase III trial will rely upon the much simpler standard CPAP intervention, according to Dr. Yaggi.

He deemed CPAP adherence in this stroke/TIA population to be similar to the rates typically seen in routine sleep medicine practice. Roughly 40% of the stroke/TIA patients were rated as having good adherence, 30% made some use of the therapy, and 30% had no or poor adherence.

Nonetheless, patients in the two intervention arms did significantly better than the usual care group in terms of 1-year changes in insulin resistance and glycosylated hemoglobin. They also had lower 24-hour mean systolic blood pressure and were more likely to convert to a favorable pattern of nocturnal blood pressure dipping. However, no differences between the intervention and usual care groups were seen in levels of high-sensitivity C-reactive protein and interleukin-6, the two markers of systemic inflammation analyzed. Nor did the CPAP intervention provide any benefit in terms of heart rate variability and other measures of autonomic function.

Fifty-eight percent of patients in the intervention arms ended up with a desirable National Institutes of Health Stroke Scale score of 0-1, compared with 38% of the usual care group. In addition, daytime sleepiness as reflected in Epworth Sleepiness Scale scores was reduced at last follow-up to a significantly greater extent in the CPAP groups, Dr. Yaggi noted.

Greater CPAP use was associated with a favorable trend for improvement in the modified Rankin score, a measure of functional ability: a 0.3-point reduction with no or poor CPAP use, a 0.4-point decrease with some use, and a 0.9-point reduction with good use.

The encouraging results will be helpful in designing a planned much larger, event-driven, definitive phase III trial, Dr. Yaggi said.

Dr. Yaggi reported having no financial conflicts regarding this National Heart, Lung and Blood Institute-sponsored study.

[email protected]

DENVER – Long-term continuous positive airway pressure (CPAP) for treatment of sleep apnea in patients with a recent mild stroke or transient ischemic attack resulted in improved cardiovascular and metabolic risk factors, better neurologic function, and a reduction in the recurrent vascular event rate, compared with usual care in the SLEEP TIGHT study.

“Up to 25% of patients will have a stroke, cardiovascular event, or death within 90 days after a minor stroke or TIA [transient ischemic attack] despite current preventive strategies. And, importantly, patients with a TIA or stroke have a high prevalence of obstructive sleep apnea – on the order of 60%-80%,” explained Dr. H. Klar Yaggi at the annual meeting of the Associated Professional Sleep Societies.

SLEEP TIGHT’s findings support the hypothesis that diagnosis and treatment of sleep apnea in patients with a recent minor stroke or TIA will address a major unmet need for better methods of reducing the high vascular risk present in this population, said Dr. Yaggi of Yale University in New Haven, Conn.

SLEEP TIGHT was a National Heart, Lung, and Blood Institute–sponsored phase II, 12-month, multicenter, single-blind, randomized, proof-of-concept study. It included 252 patients, 80% of whom had a recent minor stroke, the rest a TIA. These were patients with high levels of cardiovascular risk factors: two-thirds had hypertension, half were hyperlipidemic, 40% had diabetes, 15% had a prior MI, 10% had atrial fibrillation, and the group’s mean body mass index was 30 kg/m². Polysomnography revealed that 76% of subjects had sleep apnea as defined by an apnea-hypopnea index of at least 5 events per hour. In fact, they averaged about 23 events per hour, putting them in the moderate-severity range. As is common among stroke/TIA patients with sleep apnea, they experienced less daytime sleepiness than is typical in a sleep clinic population, with a mean baseline Epworth Sleepiness Scale score of 7.

Participants were randomized to one of three groups: a usual care control group, a CPAP arm, or an enhanced CPAP arm. The enhanced intervention protocol was designed to boost CPAP adherence; it included targeted education, a customized cognitive intervention, and additional CPAP support beyond the standard CPAP protocols used in sleep medicine clinics. Patients with sleep apnea in the two intervention arms were then placed on CPAP.

At 1 year of follow-up, the stroke rate was 8.7 per 100 patient-years in the usual care group, compared with 5.5 per 100 person-years in the combined intervention arms. The composite cardiovascular event rate, composed of all-cause mortality, acute MI, stroke, hospitalization for unstable angina, or urgent coronary revascularization, was 13.1 per 100 person-years with usual care and 11.0 in the CPAP intervention arms. While these results are encouraging, SLEEP TIGHT wasn’t powered to show significant differences in these hard events.

Outcomes across the board didn’t differ significantly between the CPAP and enhanced CPAP groups. And since the mean number of hours of CPAP use per night was also similar in the two groups – 3.9 hours with standard CPAP and 4.3 hours with enhanced CPAP – it’s likely that the phase III trial will rely upon the much simpler standard CPAP intervention, according to Dr. Yaggi.

He deemed CPAP adherence in this stroke/TIA population to be similar to the rates typically seen in routine sleep medicine practice. Roughly 40% of the stroke/TIA patients were rated as having good adherence, 30% made some use of the therapy, and 30% had no or poor adherence.

Nonetheless, patients in the two intervention arms did significantly better than the usual care group in terms of 1-year changes in insulin resistance and glycosylated hemoglobin. They also had lower 24-hour mean systolic blood pressure and were more likely to convert to a favorable pattern of nocturnal blood pressure dipping. However, no differences between the intervention and usual care groups were seen in levels of high-sensitivity C-reactive protein and interleukin-6, the two markers of systemic inflammation analyzed. Nor did the CPAP intervention provide any benefit in terms of heart rate variability and other measures of autonomic function.

Fifty-eight percent of patients in the intervention arms ended up with a desirable National Institutes of Health Stroke Scale score of 0-1, compared with 38% of the usual care group. In addition, daytime sleepiness as reflected in Epworth Sleepiness Scale scores was reduced at last follow-up to a significantly greater extent in the CPAP groups, Dr. Yaggi noted.

Greater CPAP use was associated with a favorable trend for improvement in the modified Rankin score, a measure of functional ability: a 0.3-point reduction with no or poor CPAP use, a 0.4-point decrease with some use, and a 0.9-point reduction with good use.

The encouraging results will be helpful in designing a planned much larger, event-driven, definitive phase III trial, Dr. Yaggi said.

Dr. Yaggi reported having no financial conflicts regarding this National Heart, Lung and Blood Institute-sponsored study.

[email protected]

Use of systemic glucocorticoids significantly increased risk for community-acquired Staphylococcus aureus bacteremia (CA-SAB) in a dose-dependent fashion, based on data from a large Danish registry.

On average, current users of systemic glucocorticoids had an adjusted 2.5-fold increased risk of CA-SAB, compared with nonusers. The risk was most pronounced in long-term users of glucocorticoids, including patients with connective tissue disease and patients with chronic pulmonary disease. Among new users of glucocorticoids, the risk of CA-SAB was highest for patients with cancer, in the retrospective, case-control study published by Mayo Clinic Proceedings.

CDC/Janice Haney Carr

Dr. Jesper Smit of Aalborg (Denmark) University and his colleagues, looked at all 2,638 patients admitted with first-time CA-SAB and 26,379 matched population controls in Northern Denmark medical databases between January 1, 2000, and December 31, 2011.

New glucocorticoid users had an odds ratio for CA-SAB of 2.7, slightly higher than the OR of 2.3 for long-term users. Former glucocorticoid users had a considerably lower OR for CA-SAB of 1.3.

Risk of CA-SAB rose in a dose-dependent fashion as 90-day cumulative doses increased. For subjects taking a cumulative dose of 150 mg or less, the adjusted OR for CA-SAB was 1.3. At a cumulative dose of 500-1000 mg, OR rose to 2.4. At a cumulative dose greater than 1000 mg, OR was 6.2.

Risk did not differ based on individuals’ sex, age group, or the severity of any comorbidity.

“This is the first study to specifically investigate whether the use of glucocorticoids is associated with increased risk of CA-SAB,” the authors concluded, adding that “these results extend the current knowledge of risk factors for CA-SAB and may serve as a reminder for clinicians to carefully weigh the elevated risk against the potential beneficial effect of glucocorticoid therapy, particularly in patients with concomitant CA-SAB risk factors.”

This study was supported by grants from Heinrich Kopp, Hertha Christensen, and North Denmark Health Sciences Research foundation. The authors did not report any relevant financial disclosures.

[email protected]

Use of systemic glucocorticoids significantly increased risk for community-acquired Staphylococcus aureus bacteremia (CA-SAB) in a dose-dependent fashion, based on data from a large Danish registry.

On average, current users of systemic glucocorticoids had an adjusted 2.5-fold increased risk of CA-SAB, compared with nonusers. The risk was most pronounced in long-term users of glucocorticoids, including patients with connective tissue disease and patients with chronic pulmonary disease. Among new users of glucocorticoids, the risk of CA-SAB was highest for patients with cancer, in the retrospective, case-control study published by Mayo Clinic Proceedings.

CDC/Janice Haney Carr

Dr. Jesper Smit of Aalborg (Denmark) University and his colleagues, looked at all 2,638 patients admitted with first-time CA-SAB and 26,379 matched population controls in Northern Denmark medical databases between January 1, 2000, and December 31, 2011.

New glucocorticoid users had an odds ratio for CA-SAB of 2.7, slightly higher than the OR of 2.3 for long-term users. Former glucocorticoid users had a considerably lower OR for CA-SAB of 1.3.

Risk of CA-SAB rose in a dose-dependent fashion as 90-day cumulative doses increased. For subjects taking a cumulative dose of 150 mg or less, the adjusted OR for CA-SAB was 1.3. At a cumulative dose of 500-1000 mg, OR rose to 2.4. At a cumulative dose greater than 1000 mg, OR was 6.2.

Risk did not differ based on individuals’ sex, age group, or the severity of any comorbidity.

“This is the first study to specifically investigate whether the use of glucocorticoids is associated with increased risk of CA-SAB,” the authors concluded, adding that “these results extend the current knowledge of risk factors for CA-SAB and may serve as a reminder for clinicians to carefully weigh the elevated risk against the potential beneficial effect of glucocorticoid therapy, particularly in patients with concomitant CA-SAB risk factors.”

This study was supported by grants from Heinrich Kopp, Hertha Christensen, and North Denmark Health Sciences Research foundation. The authors did not report any relevant financial disclosures.

[email protected]

Use of systemic glucocorticoids significantly increased risk for community-acquired Staphylococcus aureus bacteremia (CA-SAB) in a dose-dependent fashion, based on data from a large Danish registry.

On average, current users of systemic glucocorticoids had an adjusted 2.5-fold increased risk of CA-SAB, compared with nonusers. The risk was most pronounced in long-term users of glucocorticoids, including patients with connective tissue disease and patients with chronic pulmonary disease. Among new users of glucocorticoids, the risk of CA-SAB was highest for patients with cancer, in the retrospective, case-control study published by Mayo Clinic Proceedings.

CDC/Janice Haney Carr

Dr. Jesper Smit of Aalborg (Denmark) University and his colleagues, looked at all 2,638 patients admitted with first-time CA-SAB and 26,379 matched population controls in Northern Denmark medical databases between January 1, 2000, and December 31, 2011.

New glucocorticoid users had an odds ratio for CA-SAB of 2.7, slightly higher than the OR of 2.3 for long-term users. Former glucocorticoid users had a considerably lower OR for CA-SAB of 1.3.

Risk of CA-SAB rose in a dose-dependent fashion as 90-day cumulative doses increased. For subjects taking a cumulative dose of 150 mg or less, the adjusted OR for CA-SAB was 1.3. At a cumulative dose of 500-1000 mg, OR rose to 2.4. At a cumulative dose greater than 1000 mg, OR was 6.2.

Risk did not differ based on individuals’ sex, age group, or the severity of any comorbidity.

“This is the first study to specifically investigate whether the use of glucocorticoids is associated with increased risk of CA-SAB,” the authors concluded, adding that “these results extend the current knowledge of risk factors for CA-SAB and may serve as a reminder for clinicians to carefully weigh the elevated risk against the potential beneficial effect of glucocorticoid therapy, particularly in patients with concomitant CA-SAB risk factors.”

This study was supported by grants from Heinrich Kopp, Hertha Christensen, and North Denmark Health Sciences Research foundation. The authors did not report any relevant financial disclosures.

[email protected]

DENVER – Women who experience difficulty staying asleep are at increased risk of having one or more pregnancies that don’t result in a live birth, a large epidemiologic study suggests.

In contrast, other expressions of insomnia – difficulty in falling asleep, early morning awakening, or nonrestorative sleep – were not significantly associated with pregnancy loss in this analysis of a nationally representative sample comprised of 5,554 women aged 18-45 years, Sara Nowakowski, Ph.D., reported at the annual meeting of the Associated Professional Sleep Societies.

Wavebreak Media/Thinkstockphotos.com

The women were participants in the National Health and Nutrition Examination Survey for 2005-2008, which collected data on reproductive history as well as sleep patterns. Roughly 20% of the women self-reported experiencing insomnia. Eighty-three percent of the 18- to 45-year-old women had been pregnant at least once, and 1,870 (40%) of them had one or more prior pregnancies that didn’t result in a live birth.

In a multivariate logistic regression analysis adjusted for age, race, education level, and frequency of sleep apnea symptoms, such as snoring or snorting/gasping, frequent difficulty in maintaining sleep was independently associated with an 85% increased risk of having experienced a pregnancy that didn’t result in a live birth, according to Dr. Nowakowski, a clinical psychologist in the department of ob.gyn. at the University of Texas, Galveston.

In an interview, she was quick to note that these are correlational, hypothesis-generating data, and that an epidemiologic study such as this can’t establish causality.

Dr. Nowakowski and her coinvestigators hope to conduct a prospective randomized trial of cognitive behavioral therapy for insomnia – a well-established treatment – in a group of women with prior spontaneous abortion, miscarriage, or other infertility issues, to determine whether insomnia is a modifiable risk factor for adverse pregnancy outcomes.

Bruce Jancin/Frontline Medical News

One physician at the meeting remarked that if women with fertility problems and insomnia knew of Dr. Nowakowski’s work showing an association between insomnia and unsuccessful pregnancies, they would be pounding down the doors of sleep specialists. Dr. Nowakowski agreed.

“I surf the online networks set up for infertile women. They’re very distraught over their trouble conceiving. They’re doing yoga, de-stress programs, taking all sorts of supplements – including melatonin – to try to improve their chances of fertility,” she said. “If insomnia turns out to partially account for the risk of having pregnancies that don’t result in live birth, and treating the insomnia reduces that risk, there would be a huge amount of patient interest.”

The study was supported by the National Institutes of Health. Dr. Nowakowski reported having no financial conflicts.

[email protected]

DENVER – Women who experience difficulty staying asleep are at increased risk of having one or more pregnancies that don’t result in a live birth, a large epidemiologic study suggests.

In contrast, other expressions of insomnia – difficulty in falling asleep, early morning awakening, or nonrestorative sleep – were not significantly associated with pregnancy loss in this analysis of a nationally representative sample comprised of 5,554 women aged 18-45 years, Sara Nowakowski, Ph.D., reported at the annual meeting of the Associated Professional Sleep Societies.

Wavebreak Media/Thinkstockphotos.com

The women were participants in the National Health and Nutrition Examination Survey for 2005-2008, which collected data on reproductive history as well as sleep patterns. Roughly 20% of the women self-reported experiencing insomnia. Eighty-three percent of the 18- to 45-year-old women had been pregnant at least once, and 1,870 (40%) of them had one or more prior pregnancies that didn’t result in a live birth.

In a multivariate logistic regression analysis adjusted for age, race, education level, and frequency of sleep apnea symptoms, such as snoring or snorting/gasping, frequent difficulty in maintaining sleep was independently associated with an 85% increased risk of having experienced a pregnancy that didn’t result in a live birth, according to Dr. Nowakowski, a clinical psychologist in the department of ob.gyn. at the University of Texas, Galveston.

In an interview, she was quick to note that these are correlational, hypothesis-generating data, and that an epidemiologic study such as this can’t establish causality.

Dr. Nowakowski and her coinvestigators hope to conduct a prospective randomized trial of cognitive behavioral therapy for insomnia – a well-established treatment – in a group of women with prior spontaneous abortion, miscarriage, or other infertility issues, to determine whether insomnia is a modifiable risk factor for adverse pregnancy outcomes.

Bruce Jancin/Frontline Medical News

One physician at the meeting remarked that if women with fertility problems and insomnia knew of Dr. Nowakowski’s work showing an association between insomnia and unsuccessful pregnancies, they would be pounding down the doors of sleep specialists. Dr. Nowakowski agreed.

“I surf the online networks set up for infertile women. They’re very distraught over their trouble conceiving. They’re doing yoga, de-stress programs, taking all sorts of supplements – including melatonin – to try to improve their chances of fertility,” she said. “If insomnia turns out to partially account for the risk of having pregnancies that don’t result in live birth, and treating the insomnia reduces that risk, there would be a huge amount of patient interest.”

The study was supported by the National Institutes of Health. Dr. Nowakowski reported having no financial conflicts.

[email protected]

DENVER – Women who experience difficulty staying asleep are at increased risk of having one or more pregnancies that don’t result in a live birth, a large epidemiologic study suggests.

In contrast, other expressions of insomnia – difficulty in falling asleep, early morning awakening, or nonrestorative sleep – were not significantly associated with pregnancy loss in this analysis of a nationally representative sample comprised of 5,554 women aged 18-45 years, Sara Nowakowski, Ph.D., reported at the annual meeting of the Associated Professional Sleep Societies.

Wavebreak Media/Thinkstockphotos.com

The women were participants in the National Health and Nutrition Examination Survey for 2005-2008, which collected data on reproductive history as well as sleep patterns. Roughly 20% of the women self-reported experiencing insomnia. Eighty-three percent of the 18- to 45-year-old women had been pregnant at least once, and 1,870 (40%) of them had one or more prior pregnancies that didn’t result in a live birth.

In a multivariate logistic regression analysis adjusted for age, race, education level, and frequency of sleep apnea symptoms, such as snoring or snorting/gasping, frequent difficulty in maintaining sleep was independently associated with an 85% increased risk of having experienced a pregnancy that didn’t result in a live birth, according to Dr. Nowakowski, a clinical psychologist in the department of ob.gyn. at the University of Texas, Galveston.

In an interview, she was quick to note that these are correlational, hypothesis-generating data, and that an epidemiologic study such as this can’t establish causality.

Dr. Nowakowski and her coinvestigators hope to conduct a prospective randomized trial of cognitive behavioral therapy for insomnia – a well-established treatment – in a group of women with prior spontaneous abortion, miscarriage, or other infertility issues, to determine whether insomnia is a modifiable risk factor for adverse pregnancy outcomes.

Bruce Jancin/Frontline Medical News

One physician at the meeting remarked that if women with fertility problems and insomnia knew of Dr. Nowakowski’s work showing an association between insomnia and unsuccessful pregnancies, they would be pounding down the doors of sleep specialists. Dr. Nowakowski agreed.

“I surf the online networks set up for infertile women. They’re very distraught over their trouble conceiving. They’re doing yoga, de-stress programs, taking all sorts of supplements – including melatonin – to try to improve their chances of fertility,” she said. “If insomnia turns out to partially account for the risk of having pregnancies that don’t result in live birth, and treating the insomnia reduces that risk, there would be a huge amount of patient interest.”

The study was supported by the National Institutes of Health. Dr. Nowakowski reported having no financial conflicts.

[email protected]

SAN DIEGO – Assessment of the trachea and pleura via point-of-care ultrasound is superior to auscultation in determining the exact location of the endotracheal tube, a randomized, single-center study found.

“It’s been reported that about 20% of the time the endotracheal tube is malpositioned,” study author Dr. Davinder S. Ramsingh said in an interview at the annual meeting of the American Society of Anesthesiologists. “Most of the time (the tube) is too deep, which can lead to severe complications.”

In a double-blinded, randomized study, Dr. Ramsingh and his associates assessed the accuracy of auscultation vs. point-of-care ultrasound in verifying the correct position of the endotracheal tube (ETT). They enrolled 42 adults who required general anesthesia with ETT and randomized them to right main bronchus, left main bronchus, or tracheal intubation, followed by fiber optically–guided visualization to place the ETT. Next, an anesthesiologist blinded to the ETT exact location used auscultation to assess the location of the ETT, while another anesthesiologist blinded to the ETT exact location used point-of-care ultrasound to assess the location of the ETT. The ultrasound exam consisted of assessing tracheal dilation via standard cuff inflation with air and evaluation of pleural lung sliding, explained Dr. Ramsingh of the department of anesthesiology and perioperative care at the University of California, Irvine.

Dr. Ramsingh reported that in differentiating tracheal versus bronchial intubations, auscultation demonstrated a sensitivity of 66% and a specificity of 59%, while ultrasound demonstrated a sensitivity of 93% and a specificity of 96%. Chi-square comparison showed a statistically significant improvement with ultrasound (P = .0005), while inter-observer agreement of the ultrasound findings was 100%.

Limitations of the study, he said, include the fact that “we don’t know the incidence of malpositioned endotracheal tubes in the operating room and that this study was evaluating patients undergoing elective surgical procedures.”

The researchers reported having no financial disclosures.

[email protected]

SAN DIEGO – Assessment of the trachea and pleura via point-of-care ultrasound is superior to auscultation in determining the exact location of the endotracheal tube, a randomized, single-center study found.

“It’s been reported that about 20% of the time the endotracheal tube is malpositioned,” study author Dr. Davinder S. Ramsingh said in an interview at the annual meeting of the American Society of Anesthesiologists. “Most of the time (the tube) is too deep, which can lead to severe complications.”

In a double-blinded, randomized study, Dr. Ramsingh and his associates assessed the accuracy of auscultation vs. point-of-care ultrasound in verifying the correct position of the endotracheal tube (ETT). They enrolled 42 adults who required general anesthesia with ETT and randomized them to right main bronchus, left main bronchus, or tracheal intubation, followed by fiber optically–guided visualization to place the ETT. Next, an anesthesiologist blinded to the ETT exact location used auscultation to assess the location of the ETT, while another anesthesiologist blinded to the ETT exact location used point-of-care ultrasound to assess the location of the ETT. The ultrasound exam consisted of assessing tracheal dilation via standard cuff inflation with air and evaluation of pleural lung sliding, explained Dr. Ramsingh of the department of anesthesiology and perioperative care at the University of California, Irvine.

Dr. Ramsingh reported that in differentiating tracheal versus bronchial intubations, auscultation demonstrated a sensitivity of 66% and a specificity of 59%, while ultrasound demonstrated a sensitivity of 93% and a specificity of 96%. Chi-square comparison showed a statistically significant improvement with ultrasound (P = .0005), while inter-observer agreement of the ultrasound findings was 100%.

Limitations of the study, he said, include the fact that “we don’t know the incidence of malpositioned endotracheal tubes in the operating room and that this study was evaluating patients undergoing elective surgical procedures.”

The researchers reported having no financial disclosures.

[email protected]

SAN DIEGO – Assessment of the trachea and pleura via point-of-care ultrasound is superior to auscultation in determining the exact location of the endotracheal tube, a randomized, single-center study found.

“It’s been reported that about 20% of the time the endotracheal tube is malpositioned,” study author Dr. Davinder S. Ramsingh said in an interview at the annual meeting of the American Society of Anesthesiologists. “Most of the time (the tube) is too deep, which can lead to severe complications.”

In a double-blinded, randomized study, Dr. Ramsingh and his associates assessed the accuracy of auscultation vs. point-of-care ultrasound in verifying the correct position of the endotracheal tube (ETT). They enrolled 42 adults who required general anesthesia with ETT and randomized them to right main bronchus, left main bronchus, or tracheal intubation, followed by fiber optically–guided visualization to place the ETT. Next, an anesthesiologist blinded to the ETT exact location used auscultation to assess the location of the ETT, while another anesthesiologist blinded to the ETT exact location used point-of-care ultrasound to assess the location of the ETT. The ultrasound exam consisted of assessing tracheal dilation via standard cuff inflation with air and evaluation of pleural lung sliding, explained Dr. Ramsingh of the department of anesthesiology and perioperative care at the University of California, Irvine.

Dr. Ramsingh reported that in differentiating tracheal versus bronchial intubations, auscultation demonstrated a sensitivity of 66% and a specificity of 59%, while ultrasound demonstrated a sensitivity of 93% and a specificity of 96%. Chi-square comparison showed a statistically significant improvement with ultrasound (P = .0005), while inter-observer agreement of the ultrasound findings was 100%.

Limitations of the study, he said, include the fact that “we don’t know the incidence of malpositioned endotracheal tubes in the operating room and that this study was evaluating patients undergoing elective surgical procedures.”

The researchers reported having no financial disclosures.

[email protected]

NATIONAL HARBOR, MD. – A pair of studies by the same research team has clarified how poor sleep worsens cognitive and physical function in people with multiple sclerosis (MS) and how poor sleep can be improved by exercise.

Whether the better sleep directly relates to the cognitive and physical improvements was not shown conclusively. However, a link between exercise and transient cognitive improvement has been demonstrated by others.

©Eraxion/ thinkstockphotos.com

“Exercise may be a nonpharmacological and an inexpensive method to address sleep symptoms,” said Catherine Siengsukon, Ph.D., of the University of Kansas Medical Center, Kansas City, at the annual meeting of the Consortium of Multiple Sclerosis Centers.

About half of all people with MS experience poor sleep that results from the disease itself, medications, anxiety/depression, or other causes. The fatigue and reduced physical and psychological function diminish the quality of life and can increase the risk of mortality. “But it is unknown if poor sleep quality may impact physical function in individuals with MS,” said Dr. Siengsukon.

In healthy individuals, cognitive aspects like attention, working and long-term memory, information processing, decision making, and problem solving can all be affected by poor sleep. “But which cognitive domains are associated with poor sleep quality in people with MS is unknown,” said Dr. Siengsukon.

In the first study, 40 people (36 females) with MS (mainly relapsing-remitting MS) were analyzed through a battery of established tests of sleep quality, cognitive function, physical function, depression, anxiety, and quality of life. The subjects had a disease duration of about 12 years. All were ambulatory without the need of assistance, and none had sleep apnea.

About 68% of the subjects were considered poor sleepers with the remainder being good sleepers. They were comparable in age, sex, type of MS, disease duration, and cognitive impairment.

Compared with good sleepers, poor sleepers were significantly impaired in visuospatial memory and questionnaire-assessed physical function, were more fatigued, were more prone to be anxious and depressed, and had a worse quality of life. Independent factors of poor sleep quality included state and trait anxiety (P = .003 and .02, respectively).

“Evidence demonstrates that sleep consolidates memory. Therefore, poor sleep may selectively impair memory while not impacting other cognitive domains,” said Dr. Siengsukon.

In the second study, the influence of supervised, moderate exercise and home exercise on sleep quality was assessed in 22 other MS patients. Most had relapsing-remitting MS. The inclusion and exclusion criteria were similar to those for the first study, with additional exclusion criteria concerning cardiovascular risk of exercise.

The supervised stretching and exercise program for 12 subjects was done at a social center and utilized recumbent exercise machines, with the home-based program for 10 subjects consisting of stretching and outdoor walking. Both exercise programs were done three times weekly for 12 weeks.

Both exercise programs were beneficial in improving sleep, with the moderate-intensity program being relatively more effective than home-based exercise in two measurement scales of sleep. The greater benefit of moderate exercise might reflect the mode of exercise, with subjects feeling safer and more relaxed using a recumbent exerciser, Dr. Siengsukon said. Offering the exercise in a social setting might have been another plus.

“The results suggest that moderate-intensity exercise may improve cardiovascular fitness in people with MS. While both groups experienced moderate to large effects on sleep quality, the mechanism for improvement in sleep quality remains to be determined, as the improvement was not related to change in cardiorespiratory fitness,” said Dr. Siengsukon.

A link between treadmill exercise and transient cognitive improvement has been reported.

The studies were supported by the National Institutes of Health and the National Multiple Sclerosis Society. Dr. Siengsukon disclosed grant support from the National Multiple Sclerosis Society.

NATIONAL HARBOR, MD. – A pair of studies by the same research team has clarified how poor sleep worsens cognitive and physical function in people with multiple sclerosis (MS) and how poor sleep can be improved by exercise.

Whether the better sleep directly relates to the cognitive and physical improvements was not shown conclusively. However, a link between exercise and transient cognitive improvement has been demonstrated by others.

©Eraxion/ thinkstockphotos.com

“Exercise may be a nonpharmacological and an inexpensive method to address sleep symptoms,” said Catherine Siengsukon, Ph.D., of the University of Kansas Medical Center, Kansas City, at the annual meeting of the Consortium of Multiple Sclerosis Centers.

About half of all people with MS experience poor sleep that results from the disease itself, medications, anxiety/depression, or other causes. The fatigue and reduced physical and psychological function diminish the quality of life and can increase the risk of mortality. “But it is unknown if poor sleep quality may impact physical function in individuals with MS,” said Dr. Siengsukon.

In healthy individuals, cognitive aspects like attention, working and long-term memory, information processing, decision making, and problem solving can all be affected by poor sleep. “But which cognitive domains are associated with poor sleep quality in people with MS is unknown,” said Dr. Siengsukon.

In the first study, 40 people (36 females) with MS (mainly relapsing-remitting MS) were analyzed through a battery of established tests of sleep quality, cognitive function, physical function, depression, anxiety, and quality of life. The subjects had a disease duration of about 12 years. All were ambulatory without the need of assistance, and none had sleep apnea.

About 68% of the subjects were considered poor sleepers with the remainder being good sleepers. They were comparable in age, sex, type of MS, disease duration, and cognitive impairment.

Compared with good sleepers, poor sleepers were significantly impaired in visuospatial memory and questionnaire-assessed physical function, were more fatigued, were more prone to be anxious and depressed, and had a worse quality of life. Independent factors of poor sleep quality included state and trait anxiety (P = .003 and .02, respectively).

“Evidence demonstrates that sleep consolidates memory. Therefore, poor sleep may selectively impair memory while not impacting other cognitive domains,” said Dr. Siengsukon.

In the second study, the influence of supervised, moderate exercise and home exercise on sleep quality was assessed in 22 other MS patients. Most had relapsing-remitting MS. The inclusion and exclusion criteria were similar to those for the first study, with additional exclusion criteria concerning cardiovascular risk of exercise.

The supervised stretching and exercise program for 12 subjects was done at a social center and utilized recumbent exercise machines, with the home-based program for 10 subjects consisting of stretching and outdoor walking. Both exercise programs were done three times weekly for 12 weeks.

Both exercise programs were beneficial in improving sleep, with the moderate-intensity program being relatively more effective than home-based exercise in two measurement scales of sleep. The greater benefit of moderate exercise might reflect the mode of exercise, with subjects feeling safer and more relaxed using a recumbent exerciser, Dr. Siengsukon said. Offering the exercise in a social setting might have been another plus.

“The results suggest that moderate-intensity exercise may improve cardiovascular fitness in people with MS. While both groups experienced moderate to large effects on sleep quality, the mechanism for improvement in sleep quality remains to be determined, as the improvement was not related to change in cardiorespiratory fitness,” said Dr. Siengsukon.

A link between treadmill exercise and transient cognitive improvement has been reported.

The studies were supported by the National Institutes of Health and the National Multiple Sclerosis Society. Dr. Siengsukon disclosed grant support from the National Multiple Sclerosis Society.

NATIONAL HARBOR, MD. – A pair of studies by the same research team has clarified how poor sleep worsens cognitive and physical function in people with multiple sclerosis (MS) and how poor sleep can be improved by exercise.

Whether the better sleep directly relates to the cognitive and physical improvements was not shown conclusively. However, a link between exercise and transient cognitive improvement has been demonstrated by others.

©Eraxion/ thinkstockphotos.com

“Exercise may be a nonpharmacological and an inexpensive method to address sleep symptoms,” said Catherine Siengsukon, Ph.D., of the University of Kansas Medical Center, Kansas City, at the annual meeting of the Consortium of Multiple Sclerosis Centers.

About half of all people with MS experience poor sleep that results from the disease itself, medications, anxiety/depression, or other causes. The fatigue and reduced physical and psychological function diminish the quality of life and can increase the risk of mortality. “But it is unknown if poor sleep quality may impact physical function in individuals with MS,” said Dr. Siengsukon.

In healthy individuals, cognitive aspects like attention, working and long-term memory, information processing, decision making, and problem solving can all be affected by poor sleep. “But which cognitive domains are associated with poor sleep quality in people with MS is unknown,” said Dr. Siengsukon.

In the first study, 40 people (36 females) with MS (mainly relapsing-remitting MS) were analyzed through a battery of established tests of sleep quality, cognitive function, physical function, depression, anxiety, and quality of life. The subjects had a disease duration of about 12 years. All were ambulatory without the need of assistance, and none had sleep apnea.

About 68% of the subjects were considered poor sleepers with the remainder being good sleepers. They were comparable in age, sex, type of MS, disease duration, and cognitive impairment.

Compared with good sleepers, poor sleepers were significantly impaired in visuospatial memory and questionnaire-assessed physical function, were more fatigued, were more prone to be anxious and depressed, and had a worse quality of life. Independent factors of poor sleep quality included state and trait anxiety (P = .003 and .02, respectively).

“Evidence demonstrates that sleep consolidates memory. Therefore, poor sleep may selectively impair memory while not impacting other cognitive domains,” said Dr. Siengsukon.

In the second study, the influence of supervised, moderate exercise and home exercise on sleep quality was assessed in 22 other MS patients. Most had relapsing-remitting MS. The inclusion and exclusion criteria were similar to those for the first study, with additional exclusion criteria concerning cardiovascular risk of exercise.

The supervised stretching and exercise program for 12 subjects was done at a social center and utilized recumbent exercise machines, with the home-based program for 10 subjects consisting of stretching and outdoor walking. Both exercise programs were done three times weekly for 12 weeks.

Both exercise programs were beneficial in improving sleep, with the moderate-intensity program being relatively more effective than home-based exercise in two measurement scales of sleep. The greater benefit of moderate exercise might reflect the mode of exercise, with subjects feeling safer and more relaxed using a recumbent exerciser, Dr. Siengsukon said. Offering the exercise in a social setting might have been another plus.

“The results suggest that moderate-intensity exercise may improve cardiovascular fitness in people with MS. While both groups experienced moderate to large effects on sleep quality, the mechanism for improvement in sleep quality remains to be determined, as the improvement was not related to change in cardiorespiratory fitness,” said Dr. Siengsukon.

A link between treadmill exercise and transient cognitive improvement has been reported.

The studies were supported by the National Institutes of Health and the National Multiple Sclerosis Society. Dr. Siengsukon disclosed grant support from the National Multiple Sclerosis Society.

Recent marijuana use may have an effect similar to recent tobacco use with regard to decreased production of exhaled nitric oxide (eNO), but a very different effect on forced vital capacity (FVC), according to the results of a study published in Chest.

Dr. Stefania I. Papatheodorou from the Cyprus International Institute for Environmental and Public Health, Limassol, Cyprus, in association with the Harvard T. H. Chan School of Public Health, and her colleagues conducted a retrospective analysis of National Health and Nutrition Examination Survey (NHANES) data collected from 10,327 people aged 18-59 years between 2007 to 2012. Respondents completed a questionnaire on illicit drug use and were given a physical examination. Outcomes of interest for this study were eNO levels and pulmonary function measurements including the forced expiratory volume in 1 second (FEV₁), FVC, the FEV1/FVC ratio, and the average forced expiratory flow during the mid (25%-75%) portion of the FVC (FEF_25%-75%) (Chest. 2016 Jan 16. doi: 10.1016/j.chest.2015.12.033).

©KatarzynaBialasiewicz/thinkstockphotos.com

The population available for analysis included 4,797 people who reported never having used marijuana, and 4,084 who reported past use. The recent users were divided into two groups; 555 and 891 respondents who reported using marijuana 5-30 days and 0-4 days before their examinations, respectively. The study results from age-adjusted analyses standardized to the 2000 U.S. Census population indicated that both past and current users had significantly lower eNO levels (in parts per billion) than those that had never used (all P less than .001). The same analysis demonstrated that FEV₁, FVC, and FEV₁/FVC ratios were all higher in current and past users than in never users (all P less than .001).

Using a multivariable model adjusted for age, sex, race/ethnicity, height, education level, income, marital status, asthma, tobacco use in pack-years, smoking category, and body mass index, both the 0-4 day users and the 5-30 day users showed significantly decreased eNO levels, compared with never users (-7%, 95% confidence interval -12% to -2%, P = .03; -13%, CI -18% to -8%, P less than .001, respectively). Additionally, recent users in the 0-4 day group had significantly higher FEV₁ measures than never users (89 mL, CI 29-150, P = 0.005), as well as lower FEV₁/FVC ratios (-.02, CI –.03 to –.01, P = .003).

Regarding the broader implications of their study findings, Dr. Papatheodorou and colleagues stated, “Given that nitric oxide plays a role in inflammatory and immune defense pathways in the respiratory system and is a mediator of vasodilation in the pulmonary and systemic vasculature, it would be useful to further explore the associations between marijuana use and vascular and pulmonary function in randomized trials.”

Dr. Mary B. Rice received funding from the Institute for Environmental Sciences. The other authors reported no conflicts of interest.

Recent marijuana use may have an effect similar to recent tobacco use with regard to decreased production of exhaled nitric oxide (eNO), but a very different effect on forced vital capacity (FVC), according to the results of a study published in Chest.

Dr. Stefania I. Papatheodorou from the Cyprus International Institute for Environmental and Public Health, Limassol, Cyprus, in association with the Harvard T. H. Chan School of Public Health, and her colleagues conducted a retrospective analysis of National Health and Nutrition Examination Survey (NHANES) data collected from 10,327 people aged 18-59 years between 2007 to 2012. Respondents completed a questionnaire on illicit drug use and were given a physical examination. Outcomes of interest for this study were eNO levels and pulmonary function measurements including the forced expiratory volume in 1 second (FEV₁), FVC, the FEV1/FVC ratio, and the average forced expiratory flow during the mid (25%-75%) portion of the FVC (FEF_25%-75%) (Chest. 2016 Jan 16. doi: 10.1016/j.chest.2015.12.033).

©KatarzynaBialasiewicz/thinkstockphotos.com

The population available for analysis included 4,797 people who reported never having used marijuana, and 4,084 who reported past use. The recent users were divided into two groups; 555 and 891 respondents who reported using marijuana 5-30 days and 0-4 days before their examinations, respectively. The study results from age-adjusted analyses standardized to the 2000 U.S. Census population indicated that both past and current users had significantly lower eNO levels (in parts per billion) than those that had never used (all P less than .001). The same analysis demonstrated that FEV₁, FVC, and FEV₁/FVC ratios were all higher in current and past users than in never users (all P less than .001).

Using a multivariable model adjusted for age, sex, race/ethnicity, height, education level, income, marital status, asthma, tobacco use in pack-years, smoking category, and body mass index, both the 0-4 day users and the 5-30 day users showed significantly decreased eNO levels, compared with never users (-7%, 95% confidence interval -12% to -2%, P = .03; -13%, CI -18% to -8%, P less than .001, respectively). Additionally, recent users in the 0-4 day group had significantly higher FEV₁ measures than never users (89 mL, CI 29-150, P = 0.005), as well as lower FEV₁/FVC ratios (-.02, CI –.03 to –.01, P = .003).

Regarding the broader implications of their study findings, Dr. Papatheodorou and colleagues stated, “Given that nitric oxide plays a role in inflammatory and immune defense pathways in the respiratory system and is a mediator of vasodilation in the pulmonary and systemic vasculature, it would be useful to further explore the associations between marijuana use and vascular and pulmonary function in randomized trials.”

Dr. Mary B. Rice received funding from the Institute for Environmental Sciences. The other authors reported no conflicts of interest.

Recent marijuana use may have an effect similar to recent tobacco use with regard to decreased production of exhaled nitric oxide (eNO), but a very different effect on forced vital capacity (FVC), according to the results of a study published in Chest.

Dr. Stefania I. Papatheodorou from the Cyprus International Institute for Environmental and Public Health, Limassol, Cyprus, in association with the Harvard T. H. Chan School of Public Health, and her colleagues conducted a retrospective analysis of National Health and Nutrition Examination Survey (NHANES) data collected from 10,327 people aged 18-59 years between 2007 to 2012. Respondents completed a questionnaire on illicit drug use and were given a physical examination. Outcomes of interest for this study were eNO levels and pulmonary function measurements including the forced expiratory volume in 1 second (FEV₁), FVC, the FEV1/FVC ratio, and the average forced expiratory flow during the mid (25%-75%) portion of the FVC (FEF_25%-75%) (Chest. 2016 Jan 16. doi: 10.1016/j.chest.2015.12.033).

©KatarzynaBialasiewicz/thinkstockphotos.com

The population available for analysis included 4,797 people who reported never having used marijuana, and 4,084 who reported past use. The recent users were divided into two groups; 555 and 891 respondents who reported using marijuana 5-30 days and 0-4 days before their examinations, respectively. The study results from age-adjusted analyses standardized to the 2000 U.S. Census population indicated that both past and current users had significantly lower eNO levels (in parts per billion) than those that had never used (all P less than .001). The same analysis demonstrated that FEV₁, FVC, and FEV₁/FVC ratios were all higher in current and past users than in never users (all P less than .001).

Using a multivariable model adjusted for age, sex, race/ethnicity, height, education level, income, marital status, asthma, tobacco use in pack-years, smoking category, and body mass index, both the 0-4 day users and the 5-30 day users showed significantly decreased eNO levels, compared with never users (-7%, 95% confidence interval -12% to -2%, P = .03; -13%, CI -18% to -8%, P less than .001, respectively). Additionally, recent users in the 0-4 day group had significantly higher FEV₁ measures than never users (89 mL, CI 29-150, P = 0.005), as well as lower FEV₁/FVC ratios (-.02, CI –.03 to –.01, P = .003).

Regarding the broader implications of their study findings, Dr. Papatheodorou and colleagues stated, “Given that nitric oxide plays a role in inflammatory and immune defense pathways in the respiratory system and is a mediator of vasodilation in the pulmonary and systemic vasculature, it would be useful to further explore the associations between marijuana use and vascular and pulmonary function in randomized trials.”

Dr. Mary B. Rice received funding from the Institute for Environmental Sciences. The other authors reported no conflicts of interest.

The 2015-2016 flu season was less severe than the last three seasons, with a lower hospitalization rate and fewer pediatric deaths.

Cases of influenza appeared later in the season that typically seen, and activity didn’t peak until March, Stacy L. Davlin, Ph.D., wrote in the June 10 issue of the Morbidity and Mortality report (MMWR 2016; 22:567-75)

“During the most recent 18 influenza seasons, only two other seasons have peaked in March (2011-2012 and 2005-2006),” wrote Dr. Davlin, an epidemiologist at the Centers for Disease Control and Prevention, Atlanta. This serves as a reminder that influenza can and does occur outside the traditionally expected season, and that clinicians shouldn’t discount the possibility of flu when a patient presents with typical symptoms.

Cynthia Goldsmith/CDC photo #10073

“Although summer influenza activity in the United States typically is low, influenza cases and outbreaks have occurred during summer months, and clinicians should remain vigilant in considering influenza in the differential diagnosis of summer respiratory illnesses,” Dr. Davlin said.

The most common influenza virus of the last season was A(H1N1), which accounted for about half of cases in those aged 5-24 years, and about 70% of cases in those younger than 5 years and those 65 years and older.

Three novel viruses were seen as well: variants of A(H1N1), A(H1N2), and A(H3N2). The A(H1N1) variant occurred in a Minnesota resident who lived and worked in an area of swine farming, but who denied direct contact with pigs. The A(H3N2) variant occurred in a New Jersey resident who reported visiting a farm shortly before symptom onset. There was no evidence of human-to-human transmission. Both recovered fully without hospitalization. The A(H1N2) variant occurred in a Minnesota resident who was hospitalized but who recovered. This person was not interviewed so no possible source of infection was identified.

The CDC tested 2,408 viral specimens for susceptibility to antiviral medications. Among the 2,193 A(H1N1) specimens, less than 1% were resistant to oseltamivir and peramivir. All were susceptible to zanamivir. However, the testing found persistent high levels of resistant to amantadine and rimantadine in the A viruses. Amantadine is not effective on the B strains at all. Therefore, CDC does not recommend the use of amantadine as an anti-influenza medication.

Reports of influenza first exceeded the 2.1% baseline level in the week ending Dec. 26, 2015, according to the U.S. Outpatient Influenza-Like Illness Surveillance Network (ILINet). They remained elevated for the next 17 weeks, with a peak of 3.6% of all outpatient visits in the week ending March 12. From October 2015-April 2016, the overall hospitalization rate for influenza-like illness was 31 per 100,000. This was highest in those aged 65 years and older (85/100,000), and lowest in those aged 5-17 years (10/100,000). About 92% of adults hospitalized for flu-like illness had at least one underlying medical comorbidity, including obesity (42%), cardiovascular disease (40%), and metabolic disorders (38%). Almost half of children (48%) also had medical comorbidities, including asthma or other reactive airway disease (22%) and neurologic disorders (18%).

CDC’s National Center for Health Statistics Mortality Surveillance System found that the percentage of deaths attributed to pneumonia and influenza peaked at 8% during the week ending March 19. This is slightly lower than the death rate seen in the last 5 years, which ranged from 9% in 2011-2012 to 11% in 2012-2013.

Of this season’s deaths, 74 occurred in children. The mean and median ages of these patients were 7 years and 6 years, respectively; the range was 2 months-16 years. This total was lower than that recorded in any of the past three influenza seasons: 171 pediatric deaths in 2012-2013, 111 in 2013-2014, and 148 in 2014-2015.

Dr. Davlin also announced the Food and Drug Administration’s recommendations for composition of the 2016-2017 influenza vaccine.

Trivalent vaccines should contain an A/California/7/2009 (H1N1) pdm09-like virus, an A/Hong Kong/4801/2014 (H3N2)-like virus, and a B/Brisbane/60/2008-like virus (B/Victoria lineage). Quadrivalent vaccines, which have two influenza B viruses, should include the viruses recommended for the trivalent vaccines, as well as a B/Phuket/3073/2013-like virus (B/Yamagata lineage).

“The vaccine viruses recommended for inclusion in the 2016-2017 Northern Hemisphere influenza vaccines are the same vaccine viruses that were chosen for inclusion in 2016 Southern Hemisphere seasonal influenza vaccines,” Dr. Davlin noted. “These vaccine recommendations were based on a number of factors, including global influenza virologic and epidemiologic surveillance, genetic and antigenic characterization, antiviral susceptibility, and the availability of candidate vaccine viruses for production.”

As a CDC employee, Dr. Davlin had no financial disclosures.

[email protected]

On Twitter @Alz_Gal

The 2015-2016 flu season was less severe than the last three seasons, with a lower hospitalization rate and fewer pediatric deaths.

Cases of influenza appeared later in the season that typically seen, and activity didn’t peak until March, Stacy L. Davlin, Ph.D., wrote in the June 10 issue of the Morbidity and Mortality report (MMWR 2016; 22:567-75)

“During the most recent 18 influenza seasons, only two other seasons have peaked in March (2011-2012 and 2005-2006),” wrote Dr. Davlin, an epidemiologist at the Centers for Disease Control and Prevention, Atlanta. This serves as a reminder that influenza can and does occur outside the traditionally expected season, and that clinicians shouldn’t discount the possibility of flu when a patient presents with typical symptoms.

Cynthia Goldsmith/CDC photo #10073

“Although summer influenza activity in the United States typically is low, influenza cases and outbreaks have occurred during summer months, and clinicians should remain vigilant in considering influenza in the differential diagnosis of summer respiratory illnesses,” Dr. Davlin said.

The most common influenza virus of the last season was A(H1N1), which accounted for about half of cases in those aged 5-24 years, and about 70% of cases in those younger than 5 years and those 65 years and older.

Three novel viruses were seen as well: variants of A(H1N1), A(H1N2), and A(H3N2). The A(H1N1) variant occurred in a Minnesota resident who lived and worked in an area of swine farming, but who denied direct contact with pigs. The A(H3N2) variant occurred in a New Jersey resident who reported visiting a farm shortly before symptom onset. There was no evidence of human-to-human transmission. Both recovered fully without hospitalization. The A(H1N2) variant occurred in a Minnesota resident who was hospitalized but who recovered. This person was not interviewed so no possible source of infection was identified.

The CDC tested 2,408 viral specimens for susceptibility to antiviral medications. Among the 2,193 A(H1N1) specimens, less than 1% were resistant to oseltamivir and peramivir. All were susceptible to zanamivir. However, the testing found persistent high levels of resistant to amantadine and rimantadine in the A viruses. Amantadine is not effective on the B strains at all. Therefore, CDC does not recommend the use of amantadine as an anti-influenza medication.

Reports of influenza first exceeded the 2.1% baseline level in the week ending Dec. 26, 2015, according to the U.S. Outpatient Influenza-Like Illness Surveillance Network (ILINet). They remained elevated for the next 17 weeks, with a peak of 3.6% of all outpatient visits in the week ending March 12. From October 2015-April 2016, the overall hospitalization rate for influenza-like illness was 31 per 100,000. This was highest in those aged 65 years and older (85/100,000), and lowest in those aged 5-17 years (10/100,000). About 92% of adults hospitalized for flu-like illness had at least one underlying medical comorbidity, including obesity (42%), cardiovascular disease (40%), and metabolic disorders (38%). Almost half of children (48%) also had medical comorbidities, including asthma or other reactive airway disease (22%) and neurologic disorders (18%).

CDC’s National Center for Health Statistics Mortality Surveillance System found that the percentage of deaths attributed to pneumonia and influenza peaked at 8% during the week ending March 19. This is slightly lower than the death rate seen in the last 5 years, which ranged from 9% in 2011-2012 to 11% in 2012-2013.

Of this season’s deaths, 74 occurred in children. The mean and median ages of these patients were 7 years and 6 years, respectively; the range was 2 months-16 years. This total was lower than that recorded in any of the past three influenza seasons: 171 pediatric deaths in 2012-2013, 111 in 2013-2014, and 148 in 2014-2015.

Dr. Davlin also announced the Food and Drug Administration’s recommendations for composition of the 2016-2017 influenza vaccine.

Trivalent vaccines should contain an A/California/7/2009 (H1N1) pdm09-like virus, an A/Hong Kong/4801/2014 (H3N2)-like virus, and a B/Brisbane/60/2008-like virus (B/Victoria lineage). Quadrivalent vaccines, which have two influenza B viruses, should include the viruses recommended for the trivalent vaccines, as well as a B/Phuket/3073/2013-like virus (B/Yamagata lineage).

“The vaccine viruses recommended for inclusion in the 2016-2017 Northern Hemisphere influenza vaccines are the same vaccine viruses that were chosen for inclusion in 2016 Southern Hemisphere seasonal influenza vaccines,” Dr. Davlin noted. “These vaccine recommendations were based on a number of factors, including global influenza virologic and epidemiologic surveillance, genetic and antigenic characterization, antiviral susceptibility, and the availability of candidate vaccine viruses for production.”

As a CDC employee, Dr. Davlin had no financial disclosures.

[email protected]

On Twitter @Alz_Gal

The 2015-2016 flu season was less severe than the last three seasons, with a lower hospitalization rate and fewer pediatric deaths.

Cases of influenza appeared later in the season that typically seen, and activity didn’t peak until March, Stacy L. Davlin, Ph.D., wrote in the June 10 issue of the Morbidity and Mortality report (MMWR 2016; 22:567-75)

“During the most recent 18 influenza seasons, only two other seasons have peaked in March (2011-2012 and 2005-2006),” wrote Dr. Davlin, an epidemiologist at the Centers for Disease Control and Prevention, Atlanta. This serves as a reminder that influenza can and does occur outside the traditionally expected season, and that clinicians shouldn’t discount the possibility of flu when a patient presents with typical symptoms.

Cynthia Goldsmith/CDC photo #10073

“Although summer influenza activity in the United States typically is low, influenza cases and outbreaks have occurred during summer months, and clinicians should remain vigilant in considering influenza in the differential diagnosis of summer respiratory illnesses,” Dr. Davlin said.

The most common influenza virus of the last season was A(H1N1), which accounted for about half of cases in those aged 5-24 years, and about 70% of cases in those younger than 5 years and those 65 years and older.

Three novel viruses were seen as well: variants of A(H1N1), A(H1N2), and A(H3N2). The A(H1N1) variant occurred in a Minnesota resident who lived and worked in an area of swine farming, but who denied direct contact with pigs. The A(H3N2) variant occurred in a New Jersey resident who reported visiting a farm shortly before symptom onset. There was no evidence of human-to-human transmission. Both recovered fully without hospitalization. The A(H1N2) variant occurred in a Minnesota resident who was hospitalized but who recovered. This person was not interviewed so no possible source of infection was identified.

The CDC tested 2,408 viral specimens for susceptibility to antiviral medications. Among the 2,193 A(H1N1) specimens, less than 1% were resistant to oseltamivir and peramivir. All were susceptible to zanamivir. However, the testing found persistent high levels of resistant to amantadine and rimantadine in the A viruses. Amantadine is not effective on the B strains at all. Therefore, CDC does not recommend the use of amantadine as an anti-influenza medication.

Reports of influenza first exceeded the 2.1% baseline level in the week ending Dec. 26, 2015, according to the U.S. Outpatient Influenza-Like Illness Surveillance Network (ILINet). They remained elevated for the next 17 weeks, with a peak of 3.6% of all outpatient visits in the week ending March 12. From October 2015-April 2016, the overall hospitalization rate for influenza-like illness was 31 per 100,000. This was highest in those aged 65 years and older (85/100,000), and lowest in those aged 5-17 years (10/100,000). About 92% of adults hospitalized for flu-like illness had at least one underlying medical comorbidity, including obesity (42%), cardiovascular disease (40%), and metabolic disorders (38%). Almost half of children (48%) also had medical comorbidities, including asthma or other reactive airway disease (22%) and neurologic disorders (18%).

CDC’s National Center for Health Statistics Mortality Surveillance System found that the percentage of deaths attributed to pneumonia and influenza peaked at 8% during the week ending March 19. This is slightly lower than the death rate seen in the last 5 years, which ranged from 9% in 2011-2012 to 11% in 2012-2013.

Of this season’s deaths, 74 occurred in children. The mean and median ages of these patients were 7 years and 6 years, respectively; the range was 2 months-16 years. This total was lower than that recorded in any of the past three influenza seasons: 171 pediatric deaths in 2012-2013, 111 in 2013-2014, and 148 in 2014-2015.

Dr. Davlin also announced the Food and Drug Administration’s recommendations for composition of the 2016-2017 influenza vaccine.

Trivalent vaccines should contain an A/California/7/2009 (H1N1) pdm09-like virus, an A/Hong Kong/4801/2014 (H3N2)-like virus, and a B/Brisbane/60/2008-like virus (B/Victoria lineage). Quadrivalent vaccines, which have two influenza B viruses, should include the viruses recommended for the trivalent vaccines, as well as a B/Phuket/3073/2013-like virus (B/Yamagata lineage).

“The vaccine viruses recommended for inclusion in the 2016-2017 Northern Hemisphere influenza vaccines are the same vaccine viruses that were chosen for inclusion in 2016 Southern Hemisphere seasonal influenza vaccines,” Dr. Davlin noted. “These vaccine recommendations were based on a number of factors, including global influenza virologic and epidemiologic surveillance, genetic and antigenic characterization, antiviral susceptibility, and the availability of candidate vaccine viruses for production.”

As a CDC employee, Dr. Davlin had no financial disclosures.

[email protected]

On Twitter @Alz_Gal