Carfilzomib (K) In Relapsed And Refractory Multiple Myeloma (Rrmm): Frailtysubgroup Analysis From Phase Iii Aspire And Endeavor.

8028 Background: K-based regimens improved progression-free survival (PFS) and overall survival (OS) in RRMM patients (pts) in ASPIRE (K [27 mg/m2]-lenalidomide-dexamethasone [KRd] vs Rd) and ENDEAVOR (K [56 mg/m2]-dexamethasone [Kd56] vs bortezomib-dexamethasone [Vd]), regardless of age. Frailty scores have been developed based on age, comorbidities, and functional status (Palumbo Blood 2015;125:2068–74; Facon Blood 2015;126:4239). We assessed post hoc pt outcomes by frailty status. Methods: PFS, OS, and safety were assessed by treatment arm and frailty score (based on age, medical history-derived Charlson Comorbidity Index, and ECOG performance status); frailty scores: 0 = fit, 1 = intermediate (int), and ≥2 = frail. Results: Pt frailty status was balanced between treatment arms in ASPIRE and ENDEAVOR. Median PFS and OS were longer with K-based regimens vs controls in ASPIRE and ENDEAVOR across frailty subgroups (Table). Rates of treatment-emergent adverse events are summarized in the Table. Conclusions: Kd56 and KRd consistently improved outcomes vs Vd and Rd, respectively, in all frailty subgroups as defined by the algorithm above. These findings support the favorable benefit-risk profile of KRd and Kd56 regardless of frailty score. Clinical trial information: NCT01080391 and NCT01568866. [Table: see text]