Adjusted OS and LFS of recipients with AML or ALL of CB or BM from unrelated donors. For patients with AML, adjusted probabilities of (A) OS (CB vs BM = 48% vs 59% at 2 years, P = .010) and (C) LFS (CB vs BM = 42% vs 54% at 2 years, P = .004) were both lower in CB recipients. For patients with ALL, the adjusted probabilities of (B) OS (CB vs BM = 52% vs 53% at 2 years, P = .99) and (D) LFS (CB vs BM = 46% vs 44% at 2 years, P = .41) were similar between CB recipients and BM recipients.