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Int J Chron Obstruct Pulmon Dis. 2010 Dec 22;6:1-12. doi: 10.2147/COPD.S15666.

Sleep quality predicts quality of life in chronic obstructive pulmonary disease.

Author information

  • 1Department of Pulmonary and Critical Care, University of Maryland, Baltimore, MD, USA. sscharf@medicine.umaryland.edu

Abstract

PURPOSE:

Chronic obstructive pulmonary disease (COPD) patients may suffer from poor sleep and health-related quality of life. We hypothesized that disturbed sleep in COPD is correlated with quality of life.

METHODS:

In 180 patients with COPD (forced expired volume in 1 second [FEV(1)] 47.6 ± 15.2% predicted, 77.8% male, aged 65.9 ± 11.7 years), we administered general (Health Utilities Index 3) and disease-specific (St George's Respiratory) questionnaires and an index of disturbed sleep (Pittsburgh Sleep Quality Index).

RESULTS:

Overall scores indicated poor general (Health Utilities Index 3: 0.52 ± 0.38), disease- specific (St George's: 57.0 ± 21.3) quality of life and poor sleep quality (Pittsburgh 11.0 ± 5.4). Sleep time correlated with the number of respiratory and anxiety symptoms reported at night. Seventy-seven percent of the patients had Pittsburg scores >5, and the median Pittsburgh score was 12. On multivariate regression, the Pittsburgh Sleep Quality Index was an independent predictor of both the Health Utilities Index 3 and the St George's scores, accounting for 3% and 5%, respectively, of the scores. Only approximately 25% of the patients demonstrated excessive sleepiness (Epworth Sleepiness Scale >9).

CONCLUSIONS:

Most patients with COPD suffer disturbed sleep. Sleep quality was correlated with general and disease-specific quality of life. Only a minority of COPD patients complain of being sleepy.

KEYWORDS:

COPD; Health Utilities Index; Pittsburgh Sleep Quality Index; St George’s Respiratory Questionnaire; quality of life; sleep quality

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