Chronic disease self-management and exercise in COPD as pulmonary rehabilitation: a randomized controlled trial
Authors Cameron-Tucker H, Wood-Baker R, Owen C, Joseph L, Walters EH
Received 29 November 2013
Accepted for publication 3 February 2014
Published 19 May 2014 Volume 2014:9(1) Pages 513—523
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 4
Helen L Cameron-Tucker,1 Richard Wood-Baker,1 Christine Owen,2 Lyn Joseph,3 E Haydn Walters1
1Centre of Research Excellence for Chronic Respiratory Disease and Lung Aging, School of Medicine, University of Tasmania, Hobart, TAS, Australia; 2Faculty of Education, University of Tasmania, Hobart, TAS, Australia; 3Department of Respiratory Medicine, Royal Hobart Hospital, Hobart, TAS, Australia
Purpose: Both exercise and self-management are advocated in pulmonary rehabilitation for people with chronic obstructive pulmonary disease (COPD). The widely used 6-week, group-based Chronic Disease Self-Management Program (CDSMP) increases self-reported exercise, despite supervised exercise not being a program component. This has been little explored in COPD. Whether adding supervised exercise to the CDSMP would add benefit is unknown. We investigated the CDSMP in COPD, with and without a formal supervised exercise component, to address this question.
Patients and methods: Adult outpatients with COPD were randomized to the CDSMP with or without one hour of weekly supervised exercise over 6 weeks. The primary outcome measure was 6-minute walk test distance (6MWD). Secondary outcomes included self-reported exercise, exercise stage of change, exercise self-efficacy, breathlessness, quality of life, and self-management behaviors. Within- and between-group differences were analyzed on an intention-to-treat basis.
Results: Of 84 subjects recruited, 15 withdrew. 6MWD increased similarly in both groups: CDSMP-plus-exercise (intervention group) by 18.6±46.2 m; CDSMP-alone (control group) by 20.0±46.2 m. There was no significant difference for any secondary outcome.
Conclusion: The CDSMP produced à small statistically significant increase in 6MWD. The addition of a single supervised exercise session did not further increase exercise capacity. Our findings confirm the efficacy of a behaviorally based intervention in COPD, but this would seem to be less than expected from conventional exercise-based pulmonary rehabilitation, raising the question of how, if at all, the small gains observed in this study may be augmented.
Keywords: supervised exercise, physical capacity, 6-minute walk distance
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