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Cost-effectiveness analysis of antihypertensive triple combination therapy among patients enrolled in a Medicare
Xin Wang1, Hua Chen1, Essien E1
1Department of Pharmaceutical Health Outcomes and Policy, College of Pharmacy, University of Houston, Houston, TX, USA.
Insights
Single pill triple combination therapy for hypertension is cost-effective compared to free-drug regimens, particularly under strict adherence criteria. This approach offers better value in preventing cardiovascular events.
Area of Science:
- Cardiovascular Medicine
- Health Economics
- Pharmacoeconomics
Background:
- Hypertension management often involves multiple medications, impacting patient adherence and healthcare costs.
- Triple combination therapy aims to improve blood pressure control and reduce cardiovascular event risk.
- Fixed-dose single-pill therapies offer potential advantages in adherence and cost-effectiveness over free-drug combinations.
Purpose of the Study:
- To evaluate the cost-effectiveness of single-pill fixed-dose triple combination therapy versus free-drug triple combination therapy for cardiovascular event prevention in hypertensive patients.
- To compare health outcomes, measured in Quality-Adjusted Life Years (QALYs), and healthcare costs between the two therapeutic approaches.
- To determine the Incremental Cost-Effectiveness Ratio (ICER) for single-pill therapy relative to free-drug therapy.
Main Methods:
- A Markov model with a five-year cycle was employed for the cost-effectiveness analysis.
- Two decision models were developed, incorporating both strict and relaxed adherence definitions.
- Quality-Adjusted Life Years (QALYs) and health-care costs were estimated for each treatment strategy.
Main Results:
- Under strict adherence criteria, single-pill therapy resulted in a QALYs loss of 6.38 and costs of $486,026.20 per patient, versus 8.64 QALYs loss and $406,405.26 for free combination therapy.
- The ICER for single-pill therapy compared to free combination therapy was $33,826.46 per QALY gained under strict adherence.
- Under relaxed adherence criteria, the ICER increased to $84,932.26 per QALY gained, with QALYs loss of 8.09 and costs of $493,404.26 for single-pill therapy versus 8.76 QALYs loss and $436,415.14 for free combination therapy.
Conclusions:
- Single-pill triple combination therapy demonstrated cost-effectiveness compared to free combination therapy when a willingness-to-pay threshold of $50,000 per QALY was applied, specifically under strict adherence criteria.
- The findings suggest that improved adherence facilitated by single-pill formulations can enhance the economic value of triple therapy in hypertension management.
- Optimizing adherence through fixed-dose combinations is crucial for achieving favorable cost-effectiveness outcomes in cardiovascular disease prevention.
Objective:
To assess the cost-effectiveness of single pill fixed dose triple combination therapy vs. free triple combination therapy for the prevention of cardiovascular events among patients with hypertension.
Methods:
A Markov model with a five year cycle was constructed. Two decision models incorporating strict and more relaxed adherence definitions estimated quality adjusted life years (QALYs) and health-care costs for single pill fixed triple combination therapy vs. free-drug combination therapy.
Results:
When the strict adherence measurement criteria were applied, the total QALYs loss and cost/patient were 6.38 QALYs, $486,026.20 for the single pill triple combination therapy and 8.64 QALYs, $406,405.26 for the free combination therapy. ICER for single pill combination therapy compared to free combination therapy was 33,826.46/QALY. When the relaxed adherence measurement criteria were applied, the total QALYs loss and cost/patient were 8.09 QALYs, $493,404.26 for the single pill triple combination therapy and 8.76 QALYs, $436,415.14 for the free combination therapy. ICER for single pill combination compared with free combination therapy was 84,932.26.
Conclusion:
This study suggested that single pill triple combination therapy was cost-effective in comparison with free combination therapy under a willingness to pay threshold of 50,000 when the strict adherence measurement criteria was applied.
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