Statistical analysis
Demographic and baseline characteristics were summarized using descriptive statistics. The primary analysis of ORR was performed at a cutoff date of 6 months after the last patient's first dose. ORR was summarized by treatment arms with descriptive statistics. A 95% two‐sided confidence interval was computed using the Clopper–Pearson method. Fisher's exact test was used to compare the ORR in the control arm versus each of the combination arms, using a one‐sided significance level of 0.10 with Hochberg adjustment. CBR and proportion of patients experiencing ≥VGPR as best overall response were summarized with descriptive statistics. DOR, TTR, PFS, and OS were analyzed using the Kaplan–Meier method.