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Open Access Research

Economic evaluation of rivaroxaban in stroke prevention for patients with atrial fibrillation in Greece

Georgia Kourlaba1*, Nikos Maniadakis2, George Andrikopoulos3 and Panos Vardas4

Author Affiliations

1 The Stavros Niarchos Foundation-Collaborative Center for Clinical Epidemiology and Outcomes Research (CLEO), Thivon & Papadiamantopoulou, Goudi, Athens 115 27, Greece

2 Department of Health Services Organisation & Management, National School of Public Health, Athens, Greece

3 Cardiology Department, Henry Dunant Hospital, Athens, Greece

4 Department of Cardiology, Heraklion University Hospital, University of Crete, Heraklion, Greece

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Cost Effectiveness and Resource Allocation 2014, 12:5  doi:10.1186/1478-7547-12-5

Published: 10 February 2014

Abstract

Background

To undertake an economic evaluation of rivaroxaban relative to the standard of care for stroke prevention in patients with non-valvular atrial fibrillation (AF) in Greece.

Methods

An existing Markov model designed to reflect the natural progression of AF patients through different health states, in the course of three month cycles, was adapted to the Greek setting. The analysis was undertaken from a payer perspective. Baseline event rates and efficacy data were obtained from the ROCKET-AF trial for rivaroxaban and vitamin-K-antagonists (VKAs). Utility values for events were based on literature. A treatment-related disutility of 0.05 was applied to the VKA arm. Costs assigned to each health state reflect the year 2013. An incremental cost effectiveness ratio (ICER) was calculated where the outcome was quality-adjusted-life year (QALY) and life-years gained. Probabilistic analysis was undertaken to deal with uncertainty. The horizon of analysis was over patient life time and both cost and outcomes were discounted at 3.5%.

Results

Based on safety-on-treatment data, rivaroxaban was associated with a 0.22 increment in QALYs compared to VKA. The average total lifetime cost of rivaroxaban-treated patients was €239 lower compared to VKA. Rivaroxaban was associated with additional drug acquisition cost (€4,033) and reduced monitoring cost (-€3,929). Therefore, rivaroxaban was a dominant alternative over VKA. Probabilistic analysis revealed that there is a 100% probability of rivaroxaban being cost-effective versus VKA at a willingness to pay threshold of €30,000/QALY gained.

Conclusion

Rivaroxaban may represent for payers a dominant option for the prevention of thromboembolic events in moderate to high risk AF patients in Greece.

Keywords:
Cost-effectiveness; Vitamin-K-antagonists; Cost-utility