Korean J Fam Pract. 2018; 8(2): 236-243  https://doi.org/10.21215/kjfp.2018.8.2.236
The Relationship between Depression and Health-Related Quality of Life in Korean Adult: Using 2014 Korea National Health and Nutrition Examination Survey Data
Byoung-Gyu Kwag, Joong-Chul Park*, Wangjin Lee, Shin-Hae Chang, Dong-Ho Chun
Department of Family Medicine, Green Hospital, Seoul, Korea
Joong-Chul Park
Tel: +82-2-490-2207, Fax: +82-2-490-2242
E-mail: drawlife7@hanmail.net
ORCID: http://orcid.org/0000-0001-6156-2291
Received: May 4, 2017; Revised: July 17, 2017; Accepted: July 30, 2017; Published online: April 20, 2018.
© The 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: This study was conducted to demonstrate the relationship between depression and health-related quality of life (HRQOL) and to explore other HRQOL-related factors in Korean adults.
Methods: We analyzed data from the 2014 sixth Korea National Health and Nutrition Examination Survey. Study participants were 4,917 adults aged 19 years or over. HRQOL was measured using EuroQol-5dimension (EQ-5D), and depression using Patient Health Questionnaire-9. Statistical differences among the five items of the EQ-5D were analyzed using logistic regression analysis based on sociodemographic characteristics, number of chronic diseases, depression morbidity, and depression severity.
Results: Depression severely reduced HRQOL. With increase in the severity of symptoms, the percentage of patients with complaints increased on all items of mobility, self-care, usual activities, pain/discomfort, and anxiety/depression in the EQ-5D. General characteristics having a significant influence on HRQOL included gender, age, income, educational level, job, marital status, and number of chronic diseases.
Conclusion: Depression increased the percentage of patients with complaints on all 5 items of the EQ-5D, which resulted in severe reduction in quality of life. Social attention and further study of depression will be needed to improve the quality of life among people with depression.
Keywords: Depression; Quality of Life; Patient Health Questionnaire 9
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