Elsevier

Respiratory Medicine

Volume 108, Issue 11, November 2014, Pages 1615-1625
Respiratory Medicine

Factors associated with depression and severe depression in patients with COPD

https://doi.org/10.1016/j.rmed.2014.08.010Get rights and content
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Summary

Background

Depression is very prevalent in COPD and may be associated with poor clinical outcomes.

Method

This was a multicenter, cross-sectional study aimed at evaluating the prevalence of depression and moderate to severe depression in COPD. Depressive symptoms were evaluated with the Beck's Depression Inventory. The COPD assessment test (CAT) and the EuroQoL-5 dimensions (EQ-5D) questionnaires were used to evaluate health-related quality of life (HRQoL). Severity of COPD was assessed with the BODEx index and physical activity was estimated by the mean self-declared time walked per day.

Results

A total of 836 patients were included and up to 74.6% had some degree of depression with 51.5% having moderate to severe depression. On multivariate analysis, moderate to severe depression was associated with suicidal ideation (OR, 6.12; 95% confidence interval (CI), 1.36–28.24), worse quality of life: EQ-5D (OR, 0.89; 95%CI, 0.86–0.93) and worse CAT scores (OR, 1.32; 95%CI, 1.19–1.46). When questionnaires were not included in the analysis, significant depression was associated with the Charlson comorbidity index, minutes walked per day and BODEx score.

Conclusions

Depression is frequent in COPD and is associated with suicidal ideation, impaired HRQoL, increase in comorbidities, a reduction in physical activity and increased severity of COPD measured by the BODEx index.

Keywords

COPD
Depression
Quality of life
Physical activity
Beck's depression inventory

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Study investigators are listed in the Appendix.