PT  - JOURNAL ARTICLE
AU  - Robert N. Glidewell
AU  - Emily K. Roby
AU  - William C. Orr
TI  - Is Insomnia an Independent Predictor of Obstructive Sleep Apnea?
AID  - 10.3122/jabfm.2012.01.110123
DP  - 2012 Jan 01
TA  - The Journal of the American Board of Family
                Medicine
PG  - 104--110
VI  - 25
IP  - 1
4099  - http://www.jabfm.org/content/25/1/104.short
4100  - http://www.jabfm.org/content/25/1/104.full
SO  - J Am Board Fam Med2012 Jan 01; 25
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.