Health status in patients with disturbed sleep and obstructive sleep apnea

The health status of 435 consecutive patients with sleep disturbances neces sitating polysomnography was investigated. Patients underwent overnight pol ysomnography and health status assessment, including the Medical Outcomes S tudy SF-36 Health Survey and the Pittsburgh Sleep Qualify Index. Based on a respiratory distress index (RDI) greater than 10 to define apnea, patients with apnea were significantly (P < 0.05) more likely to be male, be older, and have higher body mass index and tower oxygen saturation levers than pa tients without apnea. Multiple domains of the SF-36 Health Survey and the P ittsburgh Steep Quality Index were-significantly worse (P < 0.05) for this population when normative data were compared. Although few differences were observed between the apneic and nonapneic patients when a cutoff point for apnea was defined as an RDI greater than 10 or 20, increasing RDI was sign ificantly associated with worsening physical functioning scores. Overall, d ecrements in health status measures were more strongly correlated with the number of oxygen desaturations below 85% than with increasing RDI. We concl ude that patients with sleep disturbances demonstrate significant decrement s in general and sleep-specific health status, but these decrements are mor e closely associated with oxygen desaturation than RDI.