Clinical and Economic Evaluation of Atezolizumab + Vemurafenib + Cobimetinib Combination and Nivolumab + Ipilimumab Combination: Administration in Metastatic Melanoma Treatment With Braf-Confirmed Mutation in Adult Patients

Abstract

The aim of the study was to conduct a pharmacoeconomic evaluation of the atezolizumab, vemurofenib and cobimetinib (ATZ+VM+COB) combination and the nivolumab and ipilimumab (NIVO+IPI) combination for the treatment of BRAF-confirmed metastatic melanoma in adult patients.Materials and methods. With the help of mathematical modeling methods, a pharmacoeconomic “cost-effectiveness” analysis; a “budget impact” analysis; a sensitivity analysis to the changes in the initial parameters of the model, were carried out.Results. The analysis of literature sources made it possible to conclude that the combination of ATZ+VM+COB compared with the combination of NIVO+IPI (15.1 and 11.2 months, respectively) has a greater clinical efficacy in terms of a progression-free survival (PFS) in patients with metastatic melanoma. When choosing the ATZ+VM+COB combination, the total cost of treatment for one adult patient with metastatic melanoma per course was lower, compared to the NIVO+IPI combination (RUB 8 326 864.89 vs RUB 7 172 751.68); the difference amounted to 1 154 113.21 rubles. When calculating the “cost-effectiveness” ratio for a year of a progression-free survival, the advantage of the ATZ + VM + COB combination in comparison with the NIVO + IPI combination, remained (5 700 200.01 rubles vs 8 942 400.10 rubles); the difference amounted to 3 242 200.09 rubles. The sensitivity analysis demonstrated the developed model stability to an increase in the cost of the ATZ + VM + COB course up to + 16%, a decrease in the cost of the NIVO + IPI course to –13%, and a reduction in the PFS to –37% against the background of the ATZ + VM + COB course. The “budget impact” analysis showed the possibility of reducing costs by 8 655 849.11 rubles with an increase from 5% to 20% in the proportion of the patients administrated with the ATZ+VM+COB combination, and with a decrease from 95% to 80% in the proportion of the patients administrated with the NIVO+IPI combination.Conclusion. The results of the work have shown that within the healthcare system of the Russian Federation, the triple combination of ATZ+VM+COB is a clinically cost-effective option for the treatment of adult metastatic melanoma patients with a confirmed BRAF mutation.