TY - JOUR T1 - Positional sleep apnea amongst adults in United Arab Emirates JF - European Respiratory Journal JO - Eur Respir J VL - 44 IS - Suppl 58 SP - P2266 AU - Sharina Aldhaheri AU - Mohammed Al-Houqani Y1 - 2014/09/01 UR - http://erj.ersjournals.com/content/44/Suppl_58/P2266.abstract N2 - Introduction: Body position during sleep affects the frequency of apnea and hypopnea in individuals with obstructive sleep apnea (OSA).Objectives: To measure the frequency of supine-related positional OSA amongst adult diagnosed with OSA and determine the clinical characteristics and polysomnographic finding for positional OSA.Methods: This is a retrospective cross sectional study reviewing 278 records of patients age ≥ 18 years who had completed overnight sleep study for OSA assessment. Respiratory events were scored according to the AASM criteria. We defined positional OSA as overall apnea hypopnea index (AHI) ≥5, and AHI at least 50% lower in lateral positions than the AHI in the supine position with ≥ 20 min of sleep in non-supine position. Forty three records out of 278 were excluded as AHI<5. From 235 patients with OSA, 125 patients had positional OSA and 110 patients had non-positional OSA.Results: Overall, 53% of patients had positional OSA. Patients with positional OSA were younger (p=0.005), lower BMI (p<0.0001), lower prevalence of hypertension (p=0.006), lower Berlin (p=0.01), and STOP (p=0.001) score compared to non -positional OSA patients. Neck and waist circumference were higher in non-positional OSA (p= 0.005, p= 0.009 respectively). The Polysomonographic data showed that patients with positional sleep apnea have lower overall AHI, wake time after sleep onset WATSO with increase in sleep efficiency and mean oxygen saturation during sleep.Conclusions: A half of the OSA patients in our cohort had positional OSA. Positional OSA is more predominant amongst younger male adult, with lower BMI, nick and waist circumferences.Keywords: Obstructive Sleep apnea, positional, supine. ER -