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. 2014 May 20;9:501–512. doi: 10.2147/COPD.S58136

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© 2014 Blakemore et al. This work is published by Dove Medical Press Limited, and licensed under Creative Commons Attribution – Non Commercial (unported, v3.0) License

The full terms of the License are available at http://creativecommons.org/licenses/by-nc/3.0/. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed.

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Forest plot of the longitudinal effect of depression on health-related quality of life in COPD.

Notes: Heterogeneity c²=6.60 (df=2); P=0.037; I²=69.7%.

Abbreviations: CI, confidence interval; COPD, chronic obstructive pulmonary disease; SGRQ, St George’s Respiratory Questionnaire.