Cost-effectiveness analysis of obinutuzumab associated to chemotherapy for the treatment of chronic lymphocytic leukemia patients ineligible for fludarabine under the Brazilian Public Healthcare System (SUS)

Abstract

Objective: The objective of the study was to evaluate the cost-effectiveness of obinutuzumab + chemotherapy (GQT) versus chemotherapy (QT) in patients with chronic lymphocytic leukemia (CLL) without previous treatment, classified as ineligible to full dose of fludarabine (slow-go) under the perspective of Brazilian Public Healthcare System (SUS). Methods: A Markov model was devel[1]oped to follow the patients with CLL through the disease course, in a time horizon of 20 years. The evaluated outcomes were progression free life years (PFLY) and life years gained (LY). The treatment cost included drug acquisition, adverse events management and patient follow-up. Efficacy data were obtained from CLL11 and CLL5 studies. Results: Incremental treatment cost was R$ 72,565. PFS for GQT and QT were respectively 3.3 and 1.1 PFLY. For LY, GQT resulted in an effectiveness of 5.7 and QT 4.3. ICER were R$ 32,477/PFLY and R$ 52,252/LY. Conclusion: GQT therapy is an option that promotes superior clinical benefits when compared to QT, and it can be considered cost-effective in the treatment of CLL in patients not eligible to full doses of fludarabine.