Journal
CHEST
Volume 138, Issue 3, Pages 543-550Publisher
ELSEVIER
DOI: 10.1378/chest.09-3066
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Funding
- University of Wisconsin School of Medicine and Public Health, Department of Medicine, and Medical Education and Research Committee-New Investigator [1UL1RR025011]
- National Center for Research Resources, National Institutes of Health
- Novartis
- Merck
- Asthmatx
- National Institutes of Health
- GlaxoSmith Kline
- Medimmune
- Genentech
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Background: Unrecognized obstructive sleep apnea (OSA) may lead to poor asthma control despite optimal therapy. Our objective was to evaluate the relationship between OSA risk and asthma control in adults. Methods: Patients with asthma seen routinely at tertiary-care clinic visits completed the validated Sleep Apnea Scale of the Sleep Disorders Questionnaire (SA-SDQ) and Asthma Control Questionnaire (ACQ). An ACQ score of >= 1.5 defined not-well-controlled asthma, and an SA-SDQ score of >= 36 for men and >= 32 for women defined high OSA risk. Logistic regression was used to model associations of high OSA risk with not-well-controlled asthma (ACQ full version and short versions). Results: Among 472 subjects with asthma, the mean +/- SD ACQ (full version) score was 0.87 +/- 0.90, and 80 (17%) subjects were not well controlled. Mean SA-SDQ score was 27 +/- 7, and 109 (23%) subjects met the definition of high OSA risk. High OSA risk was associated, on average, with 2.87-times higher odds for not-well-controlled asthma (ACQ full version) (95% CI, 1.54-5.32; P = .0009) after adjusting for obesity and other factors known to worsen asthma control. Similar independent associations were seen when using the short ACQ versions. Conclusions: High OSA risk is significantly associated with not-well-controlled asthma independent of known asthma aggravators and regardless of the ACQ version used. Patients who have difficulty achieving adequate asthma control should be screened for OSA. CHEST 2010; 138(3):543-550
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