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The online version of this article (doi:10.1186/s12889-015-2542-3) contains supplementary material, which is available to authorized users.
The authors declare that they have no competing interests.
MSL was responsible for collection and assembly of data, and worked together with IHH on study conception and design and wrote the manuscript. JSS, DJS, and JHL gave administrative and technical support, contributed to the study implementation and revised the manuscript critically for important intellectual content. YJL, MRK and JHJ made critical contributions regarding manuscript revision and analysis and interpretation of data. KBP made critical contributions regarding manuscript revision, and provided statistical expertise. IHH worked together with MSL on study conception and design and wrote the manuscript. All authors have read and approved the final manuscript.
Sleep duration holds considerable importance as an indicator of mental/physical health. The objective of this study was to investigate the association between sleep duration, mental health, and chronic disease prevalence in Koreans.
Of 31,596 subjects eligible for the Korean National Health and Nutrition Examination Survey V (2010–2012), 17,638 participants who answered items on sleep duration (aged ≥19 yrs) were analyzed in a cross-sectional study. Association between sleep duration, mental health, and chronic disease prevalence was assessed using logistic regression, and adjusted for various socioeconomic and lifestyle characteristics.
Short or long sleep duration showed correlations with mental health, and items of significance showed gender-specific patterns. Women displayed significant associations with stress and depressive symptoms, and men with stress, thoughts of suicide, and psychiatric counseling. While stress was related with short sleep duration in both genders, depressive symptoms showed a relationship with long duration in men, and short duration in women. Prevalence of any chronic disease was associated with ≤6 h sleep when adjusted for factors including mental health, and among chronic diseases, cancer and osteoarthritis showed associations with short sleep duration, while diabetes and dyslipidemia were associated with normal sleep duration.
Mental health problems were associated with sleep duration with gender-specific patterns. Associations with osteoarthritis, cancer, diabetes, dyslipidemia and abnormal sleep duration persisted after adjustment for mental health.