Chest
Original ResearchCOPDThe Impact of Disability on Depression Among Individuals With COPD
Section snippets
Sample
We used data from three waves of a population-based, longitudinal cohort study of US adults with various airways diseases, aged 55 to 75 years at recruitment.17, 31 During recruitment, subjects were asked if they had been diagnosed by a medical doctor with chronic bronchitis, emphysema, COPD, or asthma; if so, they were included in the airways disease cohort. Annual retention among the original sample averaged approximately 80% through 2006, over five follow-up telephone interviews (2002-2006).
Subject Characteristics
The majority of the sample was aged 66 years and older, women, and past or current smokers. Additional sample characteristics are presented in Table 1. The COPD group was older, more likely to be current or former smokers, and had higher disease severity scores.
Nearly one-third of those studied (34.5%, n = 186) met the depression criterion at T1. Individuals who were depressed were more likely to have less than high school education, be current smokers, have more comorbid conditions, and have
Discussion
Depression was common in this cohort of individuals with COPD and CB; approximately one-third of the cohort met the screening criterion each year. Previous studies have estimated the prevalence of depression in COPD at 7% to 60%,2, 5, 7, 50 with the broad range of estimates perhaps attributable to the wide variability in the number and characteristics of subjects and method of estimating depression.
In our analyses, crude depression rates were higher for individuals reporting a diagnosis of COPD
Acknowledgments
Author contributions: Dr Katz: contributed to planning this study, overseeing data collection, analyzing the data, and writing the manuscript.
Dr Julian: contributed to planning and conducting the study, and assisted with writing the manuscript.
Dr Omachi: contributed to conducting the study and assisted with writing the manuscript.
Dr Gregorich: contributed to conducting the study, analyzing the data, and writing the manuscript.
Dr Eisner: contributed to planning and conducting the study, and
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Funding/Support: This study was supported by the National Institutes of Health [National Heart, Lung and Blood Institute Grant R01 HL067438].
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