(A) Progression-free survival for KRdc compared to the Tdc/Rdc control group. (B) Subgroup analysis of progression-free survival with KRdc compared to the Tdc/Rdc control group. *Performed only for patients with subgroup data available. (C) Progression-free survival for KRdc compared to the Tdc and Rdc groups separately. HiR, high risk; ISS, International Staging System; KRdc, carfilzomib, lenalidomide, dexamethasone, and cyclophosphamide; NE, not estimable; P. (het), p-value from likelihood ratio test for heterogeneity of effect; Rdc, lenalidomide, dexamethasone, and cyclophosphamide; SR, standard risk; Tdc, thalidomide, dexamethasone, and cyclophosphamide; UHiR, ultra-high risk.