RT Journal Article SR Electronic T1 Is Insomnia an Independent Predictor of Obstructive Sleep Apnea? JF The Journal of the American Board of Family Medicine JO J Am Board Fam Med FD American Board of Family Medicine SP 104 OP 110 DO 10.3122/jabfm.2012.01.110123 VO 25 IS 1 A1 Glidewell, Robert N. A1 Roby, Emily K. A1 Orr, William C. YR 2012 UL http://www.jabfm.org/content/25/1/104.abstract AB Introduction: Obstructive sleep apnea (OSA) is a disorder with high prevalence in primary care. However, little research exists on screening for OSA in primary care samples. Methods: One hundred family medicine patients completed standardized symptom and demographic questionnaires and a structured clinical interview for sleep disorders. Two-step logistic regression was performed to determine the independent predictive value of insomnia for clinical identification of OSA. Additional t tests were computed to examine age and sex patterns of insomnia. Results: A model including body mass index and daytime sleepiness predicted OSA status (χ2 = 18.63; P < .001) and explained 27% of the variance in OSA clinical diagnosis. Addition of insomnia scores to the model significantly improved predictive utility (χ2 = 25.79; P < .001) and explained 36% of the variance in OSA. Insomnia scores were higher for women compared with men (P = .033) and women with OSA compared with women without OSA (P = .007). Conclusions: Inquiry regarding insomnia may improve clinical identification of OSA when screening for OSA in primary care. This finding possibly is unique to the evaluation of OSA in a primary care versus sleep laboratory sample. The predictive utility of insomnia may be specific to women.