TURKAPNE - The Turkish Sleep Apnea Database: A National, Multicenter, Observational, Prospective Cohort Study

Primary aim of the TURKAPNE (The Turkish Sleep Apnea Database) study is to generate a cross-sectional nationwide database to define clinical and polysomnographic characteristics of the sleep apnea patients in Turkey. Associations of phenotypes of sleep apnea patients with metabolic and cardiovascular diseases as well as risk for traffic accidents will be explored as secondary aims. Impact of treatment of sleep apnea on metabolic and cardiovascular complications as well as compliance with positive airway pressure treatment will be further explored longitudinally.

All subjects undergoing sleep study for suspicion of obstructive sleep apnea will be registered in a web-based national database regarding: * Anthropometric data, educational status, driving licence, * Smoking and alcohol use * Comorbidities, and drug use * Questionnaires, excessive daytime sleepiness * Polygraphic and polysomnographic findings * Blood pressure measurements * If taken, blood glucose, lipids and other biochemical markers * If measured, lung function test results * If measured, echocardiography findings * Follow-up data regarding treatment modality and compliance