Health behaviors and their correlates among participants in the Continuing to Confront COPD International Patient Survey
Received 10 December 2015
Accepted for publication 7 March 2016
Published 27 April 2016 Volume 2016:11(1) Pages 881—890
Checked for plagiarism Yes
Review by Single-blind
Peer reviewer comments 3
Editor who approved publication: Dr Richard Russell
Hana Müllerová,1 Sarah H Landis,1 Zaurbek Aisanov,2 Kourtney J Davis,3 Masakazu Ichinose,4 David M Mannino,5 Joe Maskell,1 Ana M Menezes,6 Thys van der Molen,7 Yeon-Mok Oh,8 Maggie Tabberer,9 MeiLan K Han10
1GSK, Worldwide Epidemiology, Uxbridge, UK; 2Pulmonology Research Institute, Moscow, Russia; 3GSK, Worldwide Epidemiology, Upper Providence, PA, USA; 4Tohoku University Graduate School of Medicine, Sendai, Japan; 5University of Kentucky College of Public Health, Lexington, KY, USA; 6Federal University of Pelotas, Pelotas, Brazil; 7University of Groningen, University Medical Center Groningen, Groningen, the Netherlands; 8University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea; 9GSK, Value Evidence Outcomes, Uxbridge, UK; 10Division of Pulmonary and Critical Care, University of Michigan, Ann Arbor, MI, USA
Background and aims: We used data from the Continuing to Confront COPD International Patient Survey to test the hypothesis that patients with COPD who report less engagement with their disease management are also more likely to report greater impact of the disease.
Methods: This was a population-based, cross-sectional survey of 4,343 subjects aged ≥40 years from 12 countries, fulfilling a case definition of COPD based on self-reported physician diagnosis or symptomatology. The impact of COPD was measured with COPD Assessment Test, modified Medical Research Council Dyspnea Scale, and hospital admissions and emergency department visits for COPD in the prior year. The 13-item Patient Activation Measure (PAM-13) instrument and the 8-item Morisky Medication Adherence Scale (MMAS-8) were used to measure patient disease engagement and medication adherence, respectively.
Results: Twenty-eight percent of subjects reported being either disengaged or struggling with their disease (low engagement: PAM-13 levels 1 and 2), and 35% reported poor adherence (MMAS-8 <6). In univariate analyses, lower PAM-13 and MMAS-8 scores were significantly associated with poorer COPD-specific health status, greater breathlessness and lower BMI (PAM-13 only), less satisfaction with their doctor’s management of COPD, and more emergency department visits. In multivariate regression models, poor satisfaction with their doctor’s management of COPD was significantly associated with both low PAM-13 and MMAS-8 scores; low PAM-13 scores were additionally independently associated with higher COPD Assessment Test and modified Medical Research Council scores and low BMI (underweight).
Conclusion: Poor patient engagement and medication adherence are frequent and associated with worse COPD-specific health status, higher health care utilization, and lower satisfaction with health care providers. More research will be needed to better understand what factors can be modified to improve medication adherence and patient engagement.
Keywords: chronic obstructive pulmonary disease, patient survey, patient engagement, adherence
Corrigendum for this paper has been published.
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