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

Authors
 Jae-Hyun Kim ; Eun-Cheol Park ; Ki-Bong Yoo ; Sang Gyu Lee 
Citation
 BMJ Open, Vol.5(9) : e008766, 2015 
Journal Title
 BMJ Open 
ISSN
 2044-6055 
Issue Date
2015
Abstract
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.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/141055
DOI
10.1136/bmjopen-2015-008766
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Preventive Medicine
1. 연구논문 > 4. Graduate School of Public Health > Graduate School of Public Health
Yonsei Authors
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