Journal of the Korean Society of School Health (한국학교보건학회지)

The Korean Society of School Health (한국학교보건학회)
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Relationship between Sleep Timing and Depressive Mood in Korean Adolescents: Based on the Korea Youth Risk Behavior Web-based Survey

우리나라 청소년에서 수면시작시간과 우울감의 상관관계: 청소년 건강행태온라인조사를 바탕으로

  • Goh, Eurah (Department of Family Medicine, Postgraduate Collage of Medicine, Kangwon National University)
  • 고유라 (강원대학교 의학전문대학원 가정의학교실)
  • Received : 2016.06.22
  • Accepted : 2016.08.12
  • Published : 2016.08.31
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Abstract

Purpose: The purpose of this study was to investigate the relationship between sleep timing and depressive mood in Korean adolescents. Methods: The study analyzed the data from the 2007~2015 Korea Youth Risk Behavior Web-based Survey. A total of 541,693 students in grades 7~12 were included in the final analysis. Multivariable logistic regression was used to examine their sleep timing and depressive mood, adjusted for sex, grade, region, socioeconomic status, academic performance, alcohol, smoking and physical activity. Sleep duration and sleep quality were also included in our model to identify whether or not the effect of sleep timing on depression is mediated by sleep duration or sleep quality. Results: The prevalence of depressive mood was 32.7% and the mean sleep timing was 12:13 AM. After adjustment for eligible covariates, the association between sleep timing and depressive mood showed a J-shaped curve. Adolescents who slept at 8 pm~10 pm were 39% more likely to be depressive (OR = 1.39, 95% CI 1.30~1.40) and at 3 am~ 4 am were 67% more likely to be depressive (OR=1.67, 95% CI 1.64~1.70) than adolescents who slept at 11 pm~12 am. These associations persisted after being adjusted for sleep duration and sleep quality. Conclusion: Sleep timing was related to depression in adolescents, independent of sleep duration and sleep quality. It appears that there is a certain sleep timing beneficial to mental health of adolescents.

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