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The impact of sitting time and physical activity on major depressive disorder in South Korean adults: a cross-sectional study

 Jin Young Nam  ;  Juyeong Kim  ;  Kyoung Hee Cho  ;  Jaewoo Choi  ;  Jaeyong Shin  ;  Eun-Cheol Park 
 BMC PSYCHIATRY, Vol.17(1) : 274, 2017 
Journal Title
Issue Date
Adult ; Cross-Sectional Studies ; Depressive Disorder, Major/physiopathology* ; Depressive Disorder, Major/psychology ; Exercise/psychology* ; Female ; Humans ; Logistic Models ; Male ; Middle Aged ; Nutrition Surveys ; Posture* ; Republic of Korea ; Sedentary Lifestyle ; Self Report ; Time Factors*
Major depressive disorder ; PHQ-9 ; Physical activity ; Sedentary behavior ; Sitting time
BACKGROUND: Previous studies have examined associations between sitting time and negative health outcomes and mental health. However, the relationship between overall sitting time and major depressive disorder (MDD) in South Korea has not been studied. This study examined the association between MDD and overall sitting time and physical activity in South Koreans. METHODS: Data from the sixth Korean National Health and Nutrition Examination Survey (KNHANES), a cross-sectional, nationally representative survey, were analyzed. Total participants were 4145 in 2014. MDD was assessed using the Patient Health Questionnaire (PHQ-9). Participants' data regarding self-reported sitting time and physical activity were analyzed via multiple logistic regression. RESULTS: Results showed that people who sat for 8-10 h (OR: 1.56, 95% CI: 1.15-2.11) or more than 10 h (OR: 1.71, 95% CI: 1.23-2.39) had increased risk of MDD compared to those who sat for less than 5 h a day. Subgroup analysis showed that the strongest effect of reported sitting time on risk of MDD was found in men with lower levels of physical activity who sat for 8 to 10 h (OR: 3.04, 95% CI: 1.15-8.01) or more than 10 h (OR: 3.43, 95% CI: 1.26-9.35). Level of physical activity was not an independent predictor for MDD. CONCLUSIONS: Sitting for long periods was associated with greater risk of MDD in South Korean adults. Reducing sitting time in people with MDD could help to prevent associated physical health problems and may improve mental health.
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1. College of Medicine (의과대학) > Dept. of Preventive Medicine (예방의학교실) > 1. Journal Papers
4. Graduate School of Public Health (보건대학원) > Graduate School of Public Health (보건대학원) > 1. Journal Papers
Yonsei Authors
Nam, Jin Young(남진영)
Park, Eun-Cheol(박은철) ORCID logo https://orcid.org/0000-0002-2306-5398
Shin, Jae Yong(신재용)
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