PT - JOURNAL ARTICLE AU - Selma F. Guven AU - Bulent Ciftci AU - Huseyin Lakadamyali AU - Tansu U. Ciftci TI - The high dependency of supine position in obstructive sleep apnea DP - 2013 Feb 01 TA - Saudi Medical Journal PG - 147--152 VI - 34 IP - 2 4099 - http://smj.org.sa/content/34/2/147.short 4100 - http://smj.org.sa/content/34/2/147.full SO - Saudi Med J2013 Feb 01; 34 AB - OBJECTIVE: To define the frequency of supine positional obstructive sleep apnea (OSA) in patients diagnosed with OSA and to describe the demographic associations with positional OSA (PO).METHODS: A retrospective study was performed in a total of 3813 patients who underwent full-night polysomnography at the Sleep Disorders Center of the Ataturk Chest Diseases, Thoracic Surgery Education and Research Hospital, Ankara, Turkey between June 2007 and June 2010. A total of 3214 patients diagnosed with OSA were included in the study. Positional OSA was defined as a total AHI more than or equal to 5, and supine AHI/non-supine AHI more than or equal to 2. Characteristics of positional OSA and non-positional OSA groups were compared statistically.RESULTS: Patients classified as positional OSA composed 39.9% of all OSA patients. Positional OSA patients were younger with lower body mass index and their OSA was less severe.CONCLUSION: Positional OSA, which may require different treatment approaches, is not uncommon among OSA patients and should be understood as a different clinical entity.