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Cost Effectiveness of First-Line Oral Therapies for Pulmonary Arterial Hypertension: A Modelling Study

Author

Listed:
  • Kathryn Coyle

    (Brunel University)

  • Doug Coyle

    (Brunel University
    University of Ottawa)

  • Julie Blouin

    (Canadian Agency for Drugs and Technologies in Health (CADTH))

  • Karen Lee

    (Canadian Agency for Drugs and Technologies in Health (CADTH))

  • Mohammed F. Jabr

    (Canadian Agency for Drugs and Technologies in Health (CADTH))

  • Khai Tran

    (Canadian Agency for Drugs and Technologies in Health (CADTH))

  • Lisa Mielniczuk

    (University of Ottawa Heart Institute)

  • John Swiston

    (University of British Columbia)

  • Mike Innes

    (Canadian Agency for Drugs and Technologies in Health (CADTH))

Abstract

Background In recent years, a significant number of costly oral therapies have become available for the treatment of pulmonary arterial hypertension (PAH). Funding decisions for these therapies requires weighing up their effectiveness and costs. Objective The aim of this study was to assess the cost effectiveness of monotherapy with oral PAH-specific therapies versus supportive care as initial therapy for patients with functional class (FC) II and III PAH in Canada. Methods A cost-utility analysis, from the perspective of a healthcare system and based on a Markov model, was designed to estimate the costs and quality-adjusted life-years (QALYs) associated with bosentan, ambrisentan, riociguat, tadalafil, sildenafil and supportive care for PAH in treatment-naïve patients. Separate analyses were conducted for cohorts of patients commencing therapy at FC II and III PAH. Transition probabilities, based on the relative risk of improving and worsening in FC with treatment versus placebo, were derived from a recent network meta-analysis. Utility values and costs were obtained from published data and clinical expert opinion. Extensive sensitivity analyses were conducted. Results Analysis suggests that sildenafil is the most cost-effective therapy for PAH in patients with FC II or III. Sildenafil was both the least costly and most effective therapy, thereby dominating all other treatments. Tadalafil was also less costly and more effective than supportive care in FC II and III; however, sildenafil was dominant over tadalafil. Even given the uncertainty within the clinical inputs, the probabilistic sensitivity analysis showed that apart from sildenafil and tadalafil, the other PAH therapies had negligible probability of being the most cost effective. Conclusion The results show that initiation of therapy with sildenafil is likely the most cost-effective strategy in PAH patients with either FC II or III disease.

Suggested Citation

  • Kathryn Coyle & Doug Coyle & Julie Blouin & Karen Lee & Mohammed F. Jabr & Khai Tran & Lisa Mielniczuk & John Swiston & Mike Innes, 2016. "Cost Effectiveness of First-Line Oral Therapies for Pulmonary Arterial Hypertension: A Modelling Study," PharmacoEconomics, Springer, vol. 34(5), pages 509-520, May.
    • Handle: RePEc:spr:pharme:v:34:y:2016:i:5:d:10.1007_s40273-015-0366-8
    DOI: 10.1007/s40273-015-0366-8
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    References listed on IDEAS

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    1. Briggs, Andrew & Sculpher, Mark & Claxton, Karl, 2006. "Decision Modelling for Health Economic Evaluation," OUP Catalogue, Oxford University Press, number 9780198526629.
    2. Antonio Roman & Joan Barberà & Pilar Escribano & Maria Sala & Laia Febrer & Itziar Oyagüez & Eliazar Sabater & Miguel Casado, 2012. "Cost effectiveness of prostacyclins in pulmonary arterial hypertension," Applied Health Economics and Health Policy, Springer, vol. 10(3), pages 175-188, May.
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