KMID : 0361020090520050407
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Korean Journal of Otolaryngology - Head and Neck Surgery 2009 Volume.52 No. 5 p.407 ~ p.412
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The Prevalence and Characteristics of Positional Sleep Apnea in Korea
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Kim Eun-Joong
Kwon Soon-Young Lee Seung-Hoon Choi Ji-Ho Choi Hwan Kang Sun-Mook
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Abstract
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Background and Objectives£ºObstructive sleep apnea (OSA) patients are classified into positional patients with supine apneahypopnea index (AHI) that is at least twice as high as the non-supine AHI, and non-positional patients with a supine AHI that does not reach double values of the non-supine AHI. We determined the prevalence of positional sleep apnea and compared clinical characteristics between positional and non-positional OSA patients.
Subjects and Method£ºThis was a cross-sectional study at a tertiary rhinologic referral center. We evaluated 113 patients whose AHI were over 5 and whose sleep time of supine, nonsupine position were over 15 minutes as a result of overnight polysomnography taken from January 2007 to July 2008. The body position of patients was confirmed with sleep position sensor and direct observation.
Results£ºPositional sleep apnea was seen in 14/22 (63.64%) with mild sleep apnea (AHI, 5 to 15/h), 16/36 (44.44%) with moderate sleep apnea (AHI, 15 to 30/h), 14/55 (25.45%) with severe sleep apnea (AHI, ¡Ã30/h) and over all prevalence of positional sleep apnea in this study is 38.9%. The severity of OSA, weight, waist and waist to hip ratio (WHR) is related to the positional tendency.
Conclusion£ºThe result of this study revealed that positional sleep apnea was more common in patients with mild OSA and the positional tendency of OSA patients was affected by central obesity.
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KEYWORD
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Obstructive sleep apnea, Sleep position
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