Published: 14 April 2016
Author(s): En-Ting Chang, Hsiu-Mei Wang, Hui-Ling Lai
Issue: April 2016
Section: Letter to the Editor

A previous epidemiological study reported that males have higher prevalence rates of a diagnosis and severity of obstructive sleep apnea syndrome (OSAS) than females, with a ratio of 2:1 to 3:1 [1]. Gender differences in craniofacial shape and fat deposition seem to be the most important issues between males and females [2,3]. Obesity is a well-known risk factor for the development of OSAS in both genders [4–7]. Moreover, Yukawa et al. reported that Japanese females had lower apnea–hypopnea index (AHI) values than Japanese males after adjusting for body mass index (BMI) and that male patients with OSAS had a higher continuous positive airway pressure (CPAP) compared to female patients with OSAS [8].

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