Back to Journals » International Journal of Chronic Obstructive Pulmonary Disease » Volume 13

Clinical characteristics and related risk factors of depression in patients with early COPD

Authors Lee JH, Park MA, Park MJ, Jo YS

Received 15 November 2017

Accepted for publication 18 March 2018

Published 15 May 2018 Volume 2018:13 Pages 1583—1590


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Dr Richard Russell

Ji-Hoon Lee, MinA Park, Myung Jae Park, Yong Suk Jo

Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, KyungHee University Hospital, Seoul, Republic of Korea

Background and objective: Although depression is considered one of the comorbidities of COPD, the clinical characteristics of depression in patients with early COPD remain unknown. We aimed to use national-level data to identify the clinical features and risk factors of depression in patients with early COPD.
Methods: We examined 7,550 subjects who were registered in the Korean National Health and Nutrition Examination Survey database of 2014 because that was the only year in which the Patient Health Questionnaire-9 for depression status was administered. Spirometry was used to identify patients with COPD whose forced expiratory volume in 1 second was 50% or more, and these patients were included in the analysis.
Results: Of the 211 subjects with early COPD, 14.2% also had depression, whereas 85.8% did not. The patients with depression were predominantly living alone and had a greater prevalence of diabetes compared with the patients without depression. The overall quality of life of the subjects with depression was lower than that of those without depression, and only the quality of life index correlated significantly with depression severity. In the multivariate regression analysis, female sex (adjusted OR, 1.79; 95% CI, 1.38–2.31; p<0.01), living alone (adjusted OR, 1.86; 95% CI, 1.37–2.51; p<0.01), and low income (adjusted OR, 2.17; 95% CI, 1.55–3.04; p<0.01) were identified as significant risk factors for depression.
Conclusion: In patients with early COPD, depression was associated with a low quality of life, and female sex, living alone and low income were significant risk factors for depression.

Keywords: early COPD, depression, Patient Health Questionnaire-9, risk factors

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]