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Ann Child Neurol > Volume 22(3); 2014 > Article
Journal of the Korean Child Neurology Society 2014;22(3):110-115.
DOI: https://doi.org/10.26815/jkcns.2014.22.3.110    Published online September 30, 2014.
Normal Polysomnographic Characteristics in Korean Children and Adolescents.
Soonhak Kwon, Yun Mo Gu, Ho Won Lee, Hyeeun Seo
1Department of Pediatrics, School of Medicine, Kyungpook National University, Daegu, Korea.
2Department of Pediatrics, Busan St. Mary's Medical Center, Busan, Korea. she0922@hanmail.net
3Department of Neurology, School of Medicine, Brain Science and Engineering Institute, Kyungpook National University, Daegu, Korea.
Abstract
PURPOSE
The objective of this study was to describe polysomnographic charateristics in normal children and adolescents in Korea. Little is known regarding sleep architecture in Korean children. METHODS: We conducted a prospective study and examined sleep architecture, respiratory parameters, arousals, and periodic limb movement index during sleep (PLMS) in healthy children and adolescents for 2 consecutive days. RESULTS: The study population consisted of 29 subjects and 15 subjects (52%) were male. Ages ranged from 5-16 years, with a mean of 11.6+/-.7 years. The average total sleep time (TST) was 438+/-35.6 min, and the mean sleep efficiency was 90.9+/-17.7%. The distribution of sleep stages as percentage of TST was as follows: stage N1, 6.6+/-2.9%; stage N2, 54.2+/-5.8%; stage N3, 21.1+/-6.7%; and stage R, 18.1+/-5.4%. The wake after sleep onset (WASO) was 2.0+/-2.9% of TST. The total arousal index (TAI) was 7.6+/-2.2. The current study findings are similar to those of previous studies in Western countries except longer stage N2 sleep and higher WASO. CONCLUSION: This is the first report of normal polysomnography values in Korean children. In order to accurately diagnose sleep disorders, normative sleep reference values are essential and our findings will provide fundamental data for pediatric sleep research.
Key Words: Sleep, Architecture, Polysomnography, Children, Adolescent, Reference value


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