The effects of reduced copayments on discontinuation and adherence failure to statin medication in Australia

Rachel J. Knott, Dennis J. Petrie, Emma L. Heeley, John P. Chalmers, Philip M. Clarke

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

This paper assesses whether the concession card, which offers discounted out-of-pocket costs for prescription medicines in Australia, affects discontinuation and adherence to statin therapy. The analysis uses data from the Australian Hypertension and Absolute Risk Study (AusHEART), which involves patients aged 55 years and over who visited a GP between April and June 2008. Socioeconomic and clinical information was collected and linked to administrative data on pharmaceutical use. Patients without a concession card were 63% more likely (hazard ratio (HR) 95% confidence interval (CI): 1.14-2.33) to discontinue and 60% (odds ratio (OR) CI: 1.04-2.44) more likely to fail to adhere to therapy compared to concessional patients. Smokers were 2.12 (HR CI: 1.39-3.22) times more likely to discontinue use and 2.23 (OR CI: 1.35-3.71) times more likely to fail to adhere compared to non-smokers. Patients who had recently initiated statin medication were also 2.28 (HR CI: 1.22-4.28) times more likely to discontinue use. In conclusion, higher copayments act as a disincentive for persistent and adherent use of statin medication.

Original languageEnglish
Pages (from-to)620-627
Number of pages8
JournalHealth Policy
Volume119
Issue number5
DOIs
Publication statusPublished - May 2015
Externally publishedYes

Bibliographical note

© 2015 The Authors. Published by Elsevier Ireland Ltd. This is an open access article under the CC BY-NC-ND license

Keywords

  • Adherence
  • Australian pharmaceutical benefits scheme
  • Co-payments
  • Discontinuation
  • Statins

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