bortezomib; carfilzomib; dexamethasone

Introduction: Carfilzomib is a selective proteasome inhibitor that is approved in the United States and other countries for the treatment of relapsed and refractory multiple myeloma. The randomized, open-label, multicenter, phase 3 study ENDEAVOR (NCT01568866) met its primary end point, demonstrating a statistically and clinically significant improvement in progression-free survival (PFS) for carfilzomib and dexamethasone (Kd) compared with bortezomib and dexamethasone (Vd) (median 18.7 vs 9.4 months; hazard ratio [HR], 0.53; 95% confidence interval [CI], 0.44-0.65; 1-sided P <0.001) (Dimopoulos et al, J Clin Oncol 2015;33:abstr 8509; Dimopoulos et al, Haematologica 2015;100[s1]:abstr LB2071). Herein we present results of a preplanned subgroup analysis of efficacy and safety outcomes of the ENDEAVOR study according to age.