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Clinical and economic analysis of biologic agents and targeted synthetic disease-modifying antirheumatic drugs in patients with rheumatoid arthritis: cost per responder model
AIM. To compare the cost per responder (CPR) between different groups of biologic agents and targeted synthetic disease-modifying antirheumatic drugs in patients with rheumatoid arthritis (RA).
Materials and Methods. A total of 320 patients with RA were included in the study. Patients were divided into 4 groups (n=80 in each group): group 1 received B cell-depleting agent (rituximab), group 2 – TNF-alpha (α) inhibitors, group 3 –interleukin-6 inhibitor (tocilizumab), and group 4 – Janus kinase inhibitor (tofacitinib). The effectiveness of therapy was assessed using the generally accepted index of rheumatoid arthritis activity DAS28 and the dynamics of this index after 12 months of therapy. A good response on DAS28 (current DAS28 scores of 3.2 or less with reductions in DAS28 of more than 1.2) was accepted as a response to therapy. For the leading CPR-DAS28 drugs, an ad- ditional CPR study was performed using the SDAI, CDAI, and RAPID-3 indices. Results. A good response on DAS28 was observed more frequently in group 3 (56.3%) and group 4 (6.3%) compared to group 1 (11.5%, p<0.05 in both cases) and group 2 patients (22.5%, p<0.05 in both cases). CPR-DAS28 in group 3 was RUB 1094772.6, in group 4 – RUB 1089201.3; and that was 3.3 times lower than in group 1 (RUB 3587662.2, p<0.05 in both cases) and 2.3 times lower than in group 4 (RUB 2545747.3, p<0.05 in both cases). In group 3 (tocilizumab) CPR-SDAI was RUB 786867.9, CPR-CDAI – RUB 774285.7, and CPR-RAPID-3 – RUB 786867.9. In group 4 (tofacitinib) CPR-SDAI was RUB 1048831.2, CPR-CDAI – RUB 1088379.9, and CPR-RAPID – RUB 915730.8. Conclusion. CPR were lower with interleukin-6 inhibitor and Janus kinase in- hibitor therapy than with B cell-depleting agent and TNF-α inhibitors therapy. Determination of CPR by SDAI, CDAI, and RAPID-3 indices revealed an ad- vantage of interleukin-6 inhibitor therapy over Janus kinase inhibitor therapy.
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Bibliography link:
Gerasimova D.A., Gerasimova E.V., Zakharova O.V., Popkova T.V., Lobuteva L.A., Medvedeva V.S. Clinical and economic analysis of biologic agents and targeted synthetic disease-modifying antirheumatic drugs in patients with rheumatoid arthritis: cost per responder model // Pharmacoeconomics: theory and practice. - 2022. - Vol.10, №1. - P. 22-28 DOI: https://doi.org/10.30809/phe.1.2022.3
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