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Self-reported sleep quality and acute exacerbations of chronic obstructive pulmonary disease

Authors Geiger-Brown J, Lindberg S, Krachman S, McEvoy CE, Criner GJ, Connett JE, Albert RK, Scharf SM

Received 15 October 2014

Accepted for publication 28 December 2014

Published 20 February 2015 Volume 2015:10(1) Pages 389—397

DOI https://doi.org/10.2147/COPD.S75840

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Richard Russell

Jeanne Geiger-Brown,1 Sarah Lindberg,2 Samuel Krachman,3 Charlene E McEvoy,4 Gerard J Criner,3 John E Connett,2 Richard K Albert,5 Steven M Scharf6

1Center for Health Outcomes Research, University of Maryland School of Nursing, Baltimore, MD, 2University of Minnesota School of Public Health, Division of Biostatistics, Minneapolis, MN, 3Pulmonary and Critical Care Medicine, Department of Medicine, Temple University School of Medicine, Philadelphia, PA, 4Health Partners Institute of Education and Research, St Paul, MN, 5The Medicine Service, Denver Health and Department of Medicine, the University of Colorado Denver Health Sciences Center, Denver, CO, 6Department of Medicine, Pulmonary and Critical Care Division, University of Maryland School of Medicine, Baltimore, MD, USA

Background: Many patients with chronic obstructive pulmonary disease (COPD) suffer from poor sleep quality. We hypothesized that poor sleep quality in otherwise stable patients predicted exacerbations in these patients.
Methods: This is a secondary analysis of the results of a previously published randomized trial of azithromycin in 1,117 patients with moderate to severe COPD who were clinically stable on enrollment. Sleep quality was measured using the Pittsburgh Sleep Quality Index. Other quality of life indices included the Medical Outcome Study 36-item Short Form Health Survey and the St Georges Respiratory Questionnaire. Outcomes included time to first exacerbation and exacerbation rate.
Results: Sleep quality was “poor” (Pittsburgh Sleep Quality Index >5) in 53% of participants but was not related to age or severity of airflow obstruction. Quality of life scores were worse in “poor” sleepers than in “good” sleepers. Major classes of comorbid conditions, including psychiatric, neurologic, and musculoskeletal disease, were more prevalent in the “poor” sleepers. Unadjusted time to first exacerbation was shorter (190 versus 239 days) and exacerbation rate (1.7 versus 1.37 per year) was greater in the poor sleepers, but no differences were observed after adjusting for medications and comorbid conditions associated with poor sleep.
Conclusion: Poor sleepers had greater exacerbation rates than did good sleepers. This appeared to be due largely to them having more, or more severe, concomitant medical conditions and taking more medications.

Keywords: Pittsburgh Sleep Quality Index, SF-36, St George’s Respiratory Questionnaire


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