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Cost-Effectiveness of Clopidogrel: Seeing through the Smoke

Author

Listed:
  • Lee Goldman

    (Columbia University College of Physicians and Surgeons, New York)

  • Jean-Michel Gaspoz

    (Department of Community Medicine and Primary Care, Geneva University Hospitals and University of Geneva, Geneva, Switzerland, jean-michel.gaspoz@hcuge.ch)

Abstract

Background . A recent article in this journal raised specific questions about the authors' methods for modeling the cost-effectiveness of clopidogrel for secondary prevention of coronary heart disease. The key issues raised were inclusion of incident cases, time horizon, and use of an inclusive model structure. Methods . The authors reviewed various recommendations and practices for cost-effectiveness analysis. They also performed a PubMed search for clopidogrel and cost-effectiveness from 2004 to early 2008 to obtain original analyses published in English to look for possible associations of assumptions and conclusions with reported pharmaceutical support. Results . Inclusion of incident cases and truncation at a sensible follow-up time more appropriately reflect the burden to be assumed by third-party payers. Extending the time horizon too far runs the risk of decreasing any relation with future reality. Parsimony cannot justify simplifications that omit relevant issues such as noncoronary costs, which worsen the calculated cost-effectiveness ratio of clopidogrel by 5% to 27%. The choice of the population to be analyzed has a major effect on cost-effectiveness: pharmaceutically sponsored studies published between 2004 and early 2008 focused on high-risk patients and have routinely shown more favorable cost-effectiveness ratios for clopidogrel than studies without pharmaceutical support. Conclusion . Any entity hoping to make the cost-effectiveness ratio of clopidogrel look more favorable would prefer the isolated, cohort approach and limit the analysis to high-risk patients most likely to benefit from it. This approach ignores the reality of medical policies and does not address the most relevant questions regarding the optimum use of clopidogrel.

Suggested Citation

  • Lee Goldman & Jean-Michel Gaspoz, 2008. "Cost-Effectiveness of Clopidogrel: Seeing through the Smoke," Medical Decision Making, , vol. 28(6), pages 803-809, November.
    • Handle: RePEc:sae:medema:v:28:y:2008:i:6:p:803-809
    DOI: 10.1177/0272989X08318467
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    References listed on IDEAS

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    1. Jonathan Karnon & Alan Brennan & Ron Akehurst, 2007. "A Critique and Impact Analysis of Decision Modeling Assumptions," Medical Decision Making, , vol. 27(4), pages 491-499, July.
    2. Paul F. M. Krabbe & Eddy M. M. Adang & Peep F. M. Stalmeier & Bruce R. Schackman & John Brazier & Milton C. Weinstein, 2003. "Letter to the Editor," Medical Decision Making, , vol. 23(6), pages 542-543, November.
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