Picture of UK Houses of Parliament

Leading national thinking on politics, government & public policy through Open Access research

Strathprints makes available scholarly Open Access content by researchers in the School of Government & Public Policy, based within the Faculty of Humanities & Social Sciences.

Research here is 1st in Scotland for research intensity and spans a wide range of domains. The Department of Politics demonstrates expertise in understanding parties, elections and public opinion, with additional emphases on political economy, institutions and international relations. This international angle is reflected in the European Policies Research Centre (EPRC) which conducts comparative research on public policy. Meanwhile, the Centre for Energy Policy provides independent expertise on energy, working across multidisciplinary groups to shape policy for a low carbon economy.

Explore the Open Access research of the School of Government & Public Policy. Or explore all of Strathclyde's Open Access research...

A comparison of medication adherence/persistence for asthma and chronic obstructive pulmonary disease in the United Kingdom

Covvey, J. R. and Mullen, A. B. and Ryan, M. and Steinke, D. T. and Johnston, B. F. and Wood, F. T. and Boyter, A. C. (2014) A comparison of medication adherence/persistence for asthma and chronic obstructive pulmonary disease in the United Kingdom. International Journal of Clinical Practice, 68 (10). pp. 1200-1208. ISSN 1368-5031

Text (Jordan-etal-IJCP-2014-A-comparison-of-medication-adherence-persistence-for-asthma)
Accepted Author Manuscript
License: Unspecified

Download (554kB)| Preview


    The aim of this article is to describe and compare adherence and persistence with maintenance therapies in patients with asthma or chronic obstructive pulmonary disease (COPD) in the United Kingdom (UK).  A retrospective prescribing database cohort was obtained from 44 general practitioner surgeries in National Health Service Forth Valley Scotland. Patients with physician-diagnosed asthma or COPD who received maintenance therapy between January 2008 and December 2009 were included. Five classes of therapy were assessed: inhaled corticosteroids, long-acting beta-agonists, combination therapy inhalers, theophyllines and long-acting muscarinic antagonists. Adherence was calculated using the medication possession ratio (MPR) and persistence was determined using Kaplan-Meier survival analysis for the time to discontinuation (TTD) over 1 year. Two step-wise logistic regressions were performed to assess the contribution of diagnosis to adherence/persistence.  A total of 13,322 patients were included in the analysis: 10,521 patients with asthma and 2801 patients with COPD. 25.2% of medication episodes for asthma and 45.6% of medication episodes for COPD were classified as having an adequate medication supply (MPR of 80-120%). The overall median TTD was 92 days (IQR, interquartile range: 50-186 days) for patients with asthma and 116 days (IQR: 58-259 days, comparison p < 0.001) for patients with COPD. Patients with COPD were found to be more likely to achieve an MPR of at least 80% (OR: 1.27, 95% CI: 1.15-1.40), but had a similar likelihood of persistence at 1 year to patients with asthma.  Adherence and persistence with respiratory therapies in the UK is relatively low. There is suggestion that patients with COPD may display more adherent behaviours than patients with asthma.