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Associations between time in bed and suicidal thoughts, plans and attempts in Korean adolescents

 Jae-Hyun Kim  ;  Eun-Cheol Park  ;  Sang Gyu Lee  ;  Ki-Bong Yoo 
 BMJ OPEN, Vol.5(9) : 008766, 2015 
Journal Title
Issue Date
Adolescent ; Adolescent Behavior* ; Female ; Health Surveys ; Humans ; Male ; Republic of Korea ; Risk Factors ; Sex Factors ; Sleep* ; Sleep Wake Disorders/complications ; Sleep Wake Disorders/psychology* ; Suicidal Ideation* ; Suicide, Attempted* ; Time
OBJECTIVES: To examine the hypothesis that respondents with any of three specific sleep patterns would have a higher likelihood of suicidality than those without reports of these patterns in Korean adolescents. SETTING: Data from the 2011-2013 Korea Youth Risk Behavior Web-based Survey were used. PARTICIPANTS: 191,642 subjects were included. The survey's target population was students in grades 7 through 12 in South Korea. INDEPENDENT VARIABLE: Sleep time. PRIMARY AND SECONDARY OUTCOME MEASURES: Suicidal thoughts, plans and attempts. RESULTS: The odds of suicidal thoughts in subjects with very short or long time in bed were 1.487-fold higher (95% CI 1.219 to 1.815) or 0.611-fold lower (95% CI 0.460 to 0.811), respectively, than for subjects with 7 h/day in bed; the odds were similar for suicidal plans. The odds of suicidal thoughts in subjects with early or late awakening times were 1.231-fold higher (95% CI 1.050 to 1.442) or 1.528-fold lower (95% CI 1.000 to 2.334), respectively, than for subjects with 7 h/day in bed; these odds were lower for suicidal plans and attempts. The odds of suicidal thoughts in subjects with early bedtime were 1.748-fold higher (95% CI 1.302 to 2.346), the odds of suicidal plans in people with an early bedtime were 2.494-fold higher (95% CI 1.671 to 3.722) and the odds of suicide attempts in subjects with late bedtime were 1.313-fold higher (95% CI 1.005 to 1.716) than for subjects with a bedtime of 23:00. CONCLUSIONS: The sleep-related time is associated with suicide-related behaviours in Korean adolescents. Multilateral approaches are needed to identify the greatest risk factors for suicidal behaviours.
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Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Preventive Medicine and Public Health (예방의학교실) > 1. Journal Papers
4. Graduate School of Public Health (보건대학원) > Graduate School of Public Health (보건대학원) > 1. Journal Papers
Yonsei Authors
Kim, Jae-Hyun(김재현)
Park, Eun-Cheol(박은철) ORCID logo https://orcid.org/0000-0002-2306-5398
Lee, Sang Gyu(이상규) ORCID logo https://orcid.org/0000-0003-4847-2421
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