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Sleep Disord. 2012;2012:316232. doi: 10.1155/2012/316232. Epub 2011 Dec 29.

Association of duration of sleep and cardiovascular and metabolic comorbidities in sleep apnea syndrome.

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The Department of Sleep Disorders, Dr Suat Seren Chest Diseases and Surgery Training and Research Hospital, Yenisehir, 35110 Izmir, Turkey.


Background/Aim. Previous population-based studies found association between duration of sleep and cardiovascular and metabolic comorbidities. Our aim was to investigate the association between the duration of sleep and cardiovascular and metabolic comorbidities in OSAS. Patients and Methods. The study enrolled 312 patients, who had polysomnography (PSG) during 2006-2007 and responded to a telephone-administered questionnaire providing information on characteristics of sleep on average 12 months after PSG. Results. Of the patients, 90 were female (28.8%), 173 (58.5) received the diagnosis of OSAS, 150 (45%) had no comorbidities, 122 had hypertension (HT), 44 had diabetes mellitus (DM), and 38 had coronary heart disease (CHD). Mean ± SD of age in years was 47.2 ± 10.6, 56.5 ± 9.3, 53.2 ± 8.9, and 59.9 ± 9.0 for the no comorbidity, HT, DM, and CHD groups, respectively. Reported duration of sleep was not associated with any of the comorbidities in the overall group. In the analysis restricted to OSAS patients, sleep duration ≤6 hours was significantly associated with CHD after the adjustment for age, gender, and other associated factors (OR: 5.8, 95% CI: 1.0-32.6). Conclusions. Confirmation of the association between shorter duration of sleep and CHD will provide prognostic information and help for the management of OSAS.

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