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Abstract Number: 1052

Systematic Review of Modelling Approaches and Quality for the Cost Effectiveness of sequential Targeted Therapy in Patients with Rheumatoid Arthritis That Show an Inadequate Response to at Least One Tumor Necrosis Factor Alpha Inhibitor

Aliza Matusevich1, Maria Suarez-Almazor1, Scott B. Cantor2 and Maria A. Lopez-Olivo1, 1Section of Rheumatology and Clinical Immunology, Department of General Internal Medicine, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, Houston, TX, 2Department of Health Services Research, Division of Cancer Prevention and Population Sciences, The University of Texas MD Anderson Cancer Center, Houston, TX, USA, Houston, TX

Meeting: 2017 ACR/ARHP Annual Meeting

Date of first publication: September 18, 2017

Keywords: Biologic agents, Decision analysis, Economics, small molecules and tumor necrosis factor (TNF)

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Session Information

Date: Monday, November 6, 2017

Session Title: Health Services Research Poster II: Osteoarthritis and Rheumatoid Arthritis

Session Type: ACR Poster Session B

Session Time: 9:00AM-11:00AM

Background/Purpose: Results from cost-effectiveness analysis (CEAs) comparing treatment options for patients with rheumatoid arthritis (RA) who have an inadequate response to an initial tumor necrosis factor inhibitor (TNFi) have been inconclusive. Our objective was to systematically review the modelling approaches and quality of economic evaluations comparing the cost-effectiveness, cost-utility, or cost-minimization of subsequent TNFi (cycling) versus a therapy with a different mode of action (swapping) in order to understand their discrepant results.

Methods: We searched seven electronic databases until 2016, sources of gray literature and the references of relevant publications. Two independent reviewers screened retrieved citations, including studies published in English-language and economic evaluations comparing second line biological treatments in RA patients. We excluded reviews, conference abstracts and poster presentations. Data extraction was done by one reviewer and crosschecked by another. Reporting quality was evaluated based on the Consolidated Health Economic Evaluation Reporting Standards (CHEERS) statement. Reported incremental cost-effectiveness ratios (ICERs) were synthetized and adjusted to 2016 US dollars according to rules specified by the Panel on Cost-Effectiveness in Health and Medicine.

Results: Of 4,563 citations, ten economic evaluations comprising 21 comparisons and representing six European countries, Canada and the United States were included. Most studies (8 of 10) were funded by the pharmaceutical industry. There were two discrete event simulations, three microsimulations, two Markov cohort models, two decision trees and one single study-based evaluation. The most common time horizons were lifetime (6/10) and one year (2/10). Seven studies were from a payer perspective. The cohorts were predominantly female (78%), on average aged 53.4 years, disease duration of 10.2 years and baseline health assessment questionnaire (HAQ) of 2.3. Adherence to reporting standards was good with seven studies scoring ≥26 out of 36. The most common failing point was justification of modelling choices. One study did not report any sensitivity analysis, but most performed probabilistic as well as one-way sensitivity analysis. Common influential parameters include rituximab dosing schedule as well as assumptions regarding HAQ progression and conversion to utilities. In the cost-utility analyses, the median ICER was US$25,617 for the swapping strategy, rituximab dominated in half of the comparisons. Of the CEA comparisons, tofacitinib dominated adalimumab while the ICER for abatacept versus infliximab was $20,803 and $27,976 per case of low disease activity and remission respectively. The single cost-minimization study found in favor of rituximab.

Conclusion: Despite disparate modelling approaches it appears that swapping to a targeted agents with an alternative mechanism of action is cost-effective at the $50,000/QALY threshold as ICER’s ranged between $9,323 to 41,467/QALY, dominating in 8 of 20 comparisons.


Disclosure: A. Matusevich, None; M. Suarez-Almazor, Pfizer Inc, 5; S. B. Cantor, None; M. A. Lopez-Olivo, Rheumatology Research Foundation, 2.

To cite this abstract in AMA style:

Matusevich A, Suarez-Almazor M, Cantor SB, Lopez-Olivo MA. Systematic Review of Modelling Approaches and Quality for the Cost Effectiveness of sequential Targeted Therapy in Patients with Rheumatoid Arthritis That Show an Inadequate Response to at Least One Tumor Necrosis Factor Alpha Inhibitor [abstract]. Arthritis Rheumatol. 2017; 69 (suppl 10). https://acrabstracts.org/abstract/systematic-review-of-modelling-approaches-and-quality-for-the-cost-effectiveness-of-sequential-targeted-therapy-in-patients-with-rheumatoid-arthritis-that-show-an-inadequate-response-to-at-least-one-t/. Accessed January 26, 2021.
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