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J Korean Neurol Assoc. 2019 May;37(2):144-149. Korean. Original Article.
Hwang KJ , Lee JS , Son HJ , Kim KH , Lee MJ , Kim J .
Department of Neurology, School of Medicine, Kyung Hee University, Seoul, Korea.
Department of Neurology, Pusan National University Hospital, Busan, Korea.
Biomedical Research Institute, Pusan National University Hospital, Busan, Korea.


The perception of sleep time in obstructive sleep apnea (OSA) is not well understood, some studies have reported that subjects with OSA have abnormal sleep perception. We hypothesized that the severity of OSA would affect the sleep perception of patients with OSA and investigated the associated factors that affect the sleep perception in OSA.


Four hundred and sixty eight subjects with OSA were included in present study. Subjects with OSA were divided, depending upon their sleep perception. The first group included individuals who underestimated their time spent sleeping, the second group included those who did not underestimate their sleep time. The underestimation of sleep time is defined as the perceived total sleep time being less than 80% of that measured in polysomnography (PSG). All participants were analyzed their demographics, PSG parameter and questionnaires such as Beck Depression Inventory, Epworth Sleepiness Scale.


Of 468 participants, 179 (38.2%) subjects were included in the group that underestimating sleep. Gender (female, odds ratio [OR]=2.01, 95% confidence interval [CI]=1.25–3.22), depression (OR=1.75, 95% CI=1.03–2.97) and proportion of slow wave sleep (OR=0.98, 95% CI=0.96–0.99) were related to the underestimation of sleep.


The underestimation of sleep in OSA is not directly related to OSA severity. Gender, psychiatric disorder, and sleep architecture are associated with the underestimating sleep in OSA.

Copyright © 2019. Korean Association of Medical Journal Editors.