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Cost Effectiveness of Daclatasvir/Asunaprevir Versus Peginterferon/Ribavirin and Protease Inhibitors for the Treatment of Hepatitis c Genotype 1b Naïve Patients in Chile

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  • Constanza L Vargas
  • Manuel A Espinoza
  • Andrés Giglio
  • Alejandro Soza

Abstract

Introduction: Daclatasvir and Asunaprevir (DCV/ASV) have recently been approved for the treatment of chronic hepatitis C virus infection. In association, they are more effective and safer than previous available treatments, but more expensive. It is unclear if paying for the additional costs is an efficient strategy considering limited resources. Methods: A Markov model was built to estimate the expected costs in Chilean pesos (CL$) and converted to US dollars (US$) and benefits in quality adjusted life years (QALYs) in a hypothetic cohort of naive patients receiving DCV/ASV compared to protease inhibitors (PIs) and Peginterferon plus Ribavirin (PR). Efficacy was obtained from a mixed-treatment comparison study and costs were estimated from local sources. Utilities were obtained applying the EQ-5D survey to local patients and then valued with the Chilean tariff. A time horizon of 46 years and a discount rate of 3% for costs and outcomes was considered. The ICERs were estimated for a range of DCV/ASV prices. Deterministic and probabilistic sensitivity analyses were performed. Results: PIs were extendedly dominated by DCV/ASV. The ICER of DCV/ASV compared to PR was US$ 16,635/QALY at a total treatment price of US$ 77,419; US$11,581 /QALY at a price of US$ 58,065; US$ 6,375/QALY at a price of US$ 38,710; and US$ 1,364 /QALY at a price of US$ 19,355. The probability of cost-effectiveness at a price of US$ 38,710 was 91.6% while there is a 21.43% probability that DCV/ASV dominates PR if the total treatment price was US$ 19,355. Although the results are sensitive to certain parameters, the ICER did not increase above the suggested threshold of 1 GDP per capita. Conclusions: DCV/ASV can be considered cost-effective at any price of the range studied. These results provide decision makers useful information about the value of incorporating these drugs into the public Chilean healthcare system.

Suggested Citation

  • Constanza L Vargas & Manuel A Espinoza & Andrés Giglio & Alejandro Soza, 2015. "Cost Effectiveness of Daclatasvir/Asunaprevir Versus Peginterferon/Ribavirin and Protease Inhibitors for the Treatment of Hepatitis c Genotype 1b Naïve Patients in Chile," PLOS ONE, Public Library of Science, vol. 10(11), pages 1-16, November.
    • Handle: RePEc:plo:pone00:0141660
    DOI: 10.1371/journal.pone.0141660
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    References listed on IDEAS

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    1. Phil McEwan & Ray Kim & Yong Yuan, 2013. "Assessing the Cost Utility of Response-Guided Therapy in Patients with Chronic Hepatitis C Genotype 1 in the UK Using the MONARCH Model," Applied Health Economics and Health Policy, Springer, vol. 11(1), pages 53-63, February.
    2. Scott B. Cantor, 1994. "Cost - Effectiveness Analysis, Extended Dominance, and Ethics," Medical Decision Making, , vol. 14(3), pages 259-265, August.
    3. David J. McLernon & John Dillon & Peter T. Donnan, 2008. "Systematic Review: Health-State Utilities in Liver Disease: A Systematic Review," Medical Decision Making, , vol. 28(4), pages 582-592, July.
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