Korean J Fam Pract. 2017; 7(4): 610-613  https://doi.org/10.21215/kjfp.2017.7.4.610
Associations between Physical Activity and Depression: Korean National Health and Nutrition Examination Survey 2014
So-Hee Kim*, Mu-Kyung Jeon, Byeong-Du Kang
Department of Family Medicine, Bupyeong Serim Hospital, Incheon, Korea
So-Hee Kim
Tel: +82-32-509-5555, Fax: +82-32-517-4814
E-mail: mythopoeicsh@naver.com
Received: May 2, 2016; Revised: October 25, 2016; Accepted: October 25, 2016; Published online: August 20, 2017.
© Korean Academy of Family Medicine. All rights reserved.

This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Background: In modern societies, depression is a significant public disease, and the importance of physical activity to prevent and recover from depression has been widely known. The aim of this study was to investigate the association between physical activity categories and depression.
Methods: We analyzed data of 3,739 participants aged 19 to 65 years from the Korean National Health and Nutrition Examination Survey 2014. We divided the participants into depression and non-depression groups according to 9-item Patient Health Questionnaire score and analyzed these scores using t-test and chi-square test. The odds ratio of depression in each physical activity group was calculated using a multivariable logistic regression analysis. Results were controlled for age, sex, income, occupation, sleep hours, stress, body mass index, and self-body cognition.
Results: After adjusting for the risk factors, the odds ratio of depression across the physical activity categories were 2.192 for the high-intensity workrelated group (P<0.001), 1.464 for the moderate-intensity work-related group (P=0.001), and 0.812 for the moderate-intensity exercise-related group (P=0.044).
Conclusion: The prevalence of depression increased in the work-related physical activity group and decreased in the exercise-related physical activity group. The findings of this study suggest that exercise-related physical activity has a protective effect against depression.
Keywords: Physical Activity; Patient Health Questionnarie-9; Depression
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