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Budget impact analysis of sarilumab for the treatment of rheumatoid arthritis in patients with an inadequate response to conventional synthetic DMARD or TNF inhibitor therapies

Authors Ferrufino CP, Munakata J, Wei W, Proudfoot C, Kuznik A, Boklage SH, Chen C

Received 26 January 2018

Accepted for publication 23 September 2018

Published 16 November 2018 Volume 2018:10 Pages 805—819

DOI https://doi.org/10.2147/CEOR.S163829

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Ms Justinn Cochran

Peer reviewer comments 2

Editor who approved publication: Professor Samer Hamidi


Cheryl P Ferrufino,1 Julie Munakata,1 Wenhui Wei,2 Clare Proudfoot,3 Andreas Kuznik,4 Susan H Boklage,4 Chieh-I Chen4

1IQVIA, Fairfax, VA, USA; 2Sanofi, Bridgewater, NJ, USA; 3Sanofi, Guildford, UK; 4Regeneron Pharmaceuticals, Inc., Tarrytown, NY, USA

Objective: To estimate the 5-year budget impact (BI) on a US health plan of introducing sarilumab – a human immunoglobulin G1 anti-IL-6 receptor α monoclonal antibody – as combination treatment with conventional synthetic disease-modifying antirheumatic drugs (csDMARDs) or monotherapy in patients with moderate-to-severe rheumatoid arthritis (RA).
Methods: BI analysis was conducted from a commercial payer perspective. Treatment-eligible populations included adult patients with moderate-to-severe RA and inadequate response (IR) to csDMARDs or tumor necrosis factor (TNF)-α inhibitors-IR. All licensed biologic treatments recommended by the American College of Rheumatology guidelines were included.
Results: For a hypothetical plan of one million members, 409 csDMARD-IR and 345 TNF-IR patients were annually eligible for combination therapy and 226 csDMARD and TNF-IR patients for monotherapy with sarilumab. Based on 2018 US direct treatment costs, the introduction of sarilumab was estimated to save $526,424, $322,637 and $264,306 over 5 years for csDMARD-IR combination therapy patients, TNF-IR combination therapy patients, and csDMARD-IR/TNF-IR monotherapy patients, respectively. As sarilumab absorbed a greater market share over the horizon, annual savings increased from years 1 to 5, $28,610 (–0.14%) to $194,646 (–0.83%) in csDMARD-IR, $16,986 (–0.11%) to $120,893 (–0.67%) in TNF-IR, and $14,256 (–0.13%) to $98,040 (–0.79%) in monotherapy. One-way sensitivity analyses revealed that the model was most sensitive to variations in sarilumab adherence.
Conclusion: Total cost savings of introducing sarilumab to a health-care plan accrued from years 1 to 5, attributable to the lower treatment cost, stable dosing paradigm, and price parity for the two available doses (150 and 200 mg every 2 weeks) compared with alternative biologic DMARDs that have substantial variability in dose titration/schedules.

Keywords:
treatment costs, disease-modifying anti-rheumatic drug, IL-6 inhibitor
 Corrigendum for this paper has been published

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