title: Weekend catch-up sleep is independently associated with suicide attempts and self-injury in Korean adolescents.
abstract: The current study aims to determine the associations of insufficient sleep with suicide attempts and self-injury in a large, school-based Korean adolescent sample. A sample of 4553 middle- and high-school students (grades 7-10) was recruited in this study. Finally, 4145 students completed self-report questionnaires including items on sleep duration (weekday/weekend), self-injury, suicide attempts during the past year, the Suicidal Ideation Questionnaire (SIQ), and the Beck Depression Inventory (BDI). A multiple linear regression model showed that higher SIQ scores were associated with longer weekend catch-up sleep duration (p=0.009), higher BDI score (p<0.001), and longer time spent in a private educational institute (p=0.025). The multiple logistic regression analysis revealed that longer weekend catch-up sleep duration (p=0.011), higher BDI score (p<0.001), longer time spent in a private educational institute (p=0.046), and poorer academic record (p=0.029) were associated with suicide attempt and self-injury during the past year. The present results suggest that weekend catch-up sleep duration--which is an indicator of insufficient weekday sleep--might be associated with suicide attempts and self-injury in Korean adolescents.
authors.affiliation: Department of Psychiatry, Gachon University, School of Medicine, Incheon, Republic of Korea.
authors.forename: Seung-Gul
authors.initials: SG
authors.lastname: Kang
authors.affiliation: Department of Psychiatry, College of Medicine, Seoul National University, Seoul, Republic of Korea. Electronic address: leeyj1203@gmail.com.
authors.forename: Yu Jin
authors.initials: YJ
authors.lastname: Lee
authors.affiliation: Department of Medicine, College of Medicine, Seoul National University, Seoul, Republic of Korea.
authors.forename: Seog Ju
authors.initials: SJ
authors.lastname: Kim
authors.affiliation: Department of Psychiatry, College of Medicine, Ewha Womans University, Seoul, Republic of Korea.
authors.forename: Weonjeong
authors.initials: W
authors.lastname: Lim
authors.affiliation: Department of Psychiatry, College of Medicine, Korea University, Seoul, Republic of Korea.
authors.forename: Heon-Jeong
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Psychiatry, College of Medicine, Inje University, Goyang, Republic of Korea.
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Park
authors.affiliation: Department of Psychiatry, Gachon University, School of Medicine, Incheon, Republic of Korea.
authors.forename: In Hee
authors.initials: IH
authors.lastname: Cho
authors.affiliation: Department of Psychiatry, Gachon University, School of Medicine, Incheon, Republic of Korea.
authors.forename: Seong-Jin
authors.initials: SJ
authors.lastname: Cho
authors.affiliation: Department of Psychiatry, College of Medicine, University of Ulsan, Seoul, Republic of Korea.
authors.forename: Jin Pyo
authors.initials: JP
authors.lastname: Hong
mesh_terms: D000293:Adolescent; D003863:Depression / Q000523:psychology; D005260:Female; D006801:Humans; D008297:Male; D056910:Republic of Korea; D016728:Self-Injurious Behavior / Q000523:psychology*; D012890:Sleep / Q000502:physiology*; D059020:Suicidal Ideation; D013405:Suicide / Q000523:psychology*; D013406:Suicide, Attempted / Q000523:psychology; D011795:Surveys and Questionnaires; D013997:Time Factors