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Adherence To Respiratory And Nonrespiratory Medication In Patients With COPD: Results Of The German COSYCONET Cohort

Authors Königsdorfer N, Jörres RA, Söhler S, Welte T, Behr J, Ficker JH, Bals R, Watz H, Lutter JI, Lucke T, Biertz F, Alter P, Vogelmeier CF, Kahnert K

Received 16 July 2019

Accepted for publication 13 September 2019

Published 10 October 2019 Volume 2019:13 Pages 1711—1721


Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 2

Editor who approved publication: Dr Johnny Chen

Norbert Königsdorfer,1 Rudolf A Jörres,1 Sandra Söhler,2 Tobias Welte,3 Jürgen Behr,4 Joachim H Ficker,5 Robert Bals,6 Henrik Watz,7 Johanna I Lutter,8 Tanja Lucke,1 Frank Biertz,9 Peter Alter,10 Claus F Vogelmeier,10 Kathrin Kahnert4

1Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, Comprehensive Pneumology Center Munich (CPC-M), Ludwig-Maximilians-Universität München, Munich 80336, Germany; 2ASCONET Study Coordination Office, University of Marburg, Marburg 35043, Germany; 3Department of Pneumology, Hannover Medical School, Hannover 30625, Germany; 4Department of Internal Medicine V, University of Munich, Comprehensive Pneumology Center, Member of the German Center for Lung Research, Munich 80336, Germany; 5Department of Respiratory Medicine, Allergology and Sleep Medicine, General Hospital Nuernberg, Paracelsus Medical University, Nuernberg, Germany; 6Department of Internal Medicine V, Pneumology, Allergology, Respiratory Intensive Care Medicine, Saarland University Hospital, Homburg 66424, Germany; 7Pulmonary Research Institute at LungenClinic Grosshansdorf, Airway Research Center North, Member of the German Center for Lung Research, Grosshansdorf 22927, Germany; 8Institute of Health Economics and Health Care Management, Helmholtz Zentrum München GmbH – German Research Center for Environmental Health, Comprehensive Pneumology Center Munich (CPC-M), Munich 85764, Germany; 9Institute for Biostatistics, Hannover Medical School, Hannover 30625, Germany; 10Department of Medicine, Pulmonary and Critical Care Medicine, University Medical Center Giessen and Marburg, Philipps-University Marburg, Marburg 35043, Germany

Correspondence: Kathrin Kahnert
Department of Internal Medicine V, University of Munich, Comprehensive Pneumology Center, Member of the German Center for Lung Research, Ziemssenstr. 1, Munich 80336, Germany
Tel +49 89 4400 2590

Background: Adherence to COPD medication is often considered to be lower than in other chronic diseases. In view of the frequent comorbidities of COPD, the economic impact of nonadherence and the potential for adverse effects, a direct comparison between the adherence to respiratory and nonrespiratory medication in the same patients seems of particular interest.
Objectives: We aimed to investigate the intake of respiratory and nonrespiratory medication in the same patients with COPD and frequent comorbidities.
Method: Within the COPD cohort COSYCONET, we contacted 1042 patients, mailing them a list with all medication regarding all their diseases, asking for regular, irregular and non-intake.
Results: Valid responses were obtained in 707 patients covering a wide spectrum of drugs. Intake of LABA, LAMA or ICS was regular in 91.9% of patients, even higher for cardiovascular and antidiabetes medication but lower for hyperlipidemia and depression/anxiety medication. Regular intake of respiratory medication did not depend on GOLD groups A-D or grades 1–4, was highest in patients with concomitant cardiovascular disorders and was lowest for concomitant asthma. It was slightly larger for LAMA and LABA administered via combined compared to single inhalers, and lower when similar compounds were prescribed twice. Most differences did not reach statistical significance owing to the overall high adherence.
Conclusion: Our results indicate a high adherence to respiratory medication in participants of a COPD cohort, especially in those with cardiovascular comorbidities. Compared to the lower adherence reported in the literature for COPD patients, our observations still suggest some room for improvement, possibly through disease management programs.

Keywords: COPD, treatment adherence, respiratory medication, nonrespiratory medication

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