RFS and overall survival by conditioning regimen intensity. (A) The 3-year probability of RFS adjusted for age, performance score, HCT-CI, diagnosis, and disease risk index was 44% (95% CI, 39-48) for Bu4/Cy, 44% (95% CI, 39-48) for Flu/Bu4, 38% (95% CI, 32-44) for Flu/Bu4 + ATG, 38% (95% CI, 33-43) for Flu/Bu2, 31% (95% CI, 26-37) for Flu/Bu2 + ATG, 52% (95% CI, 45-59) for Flu/Mel, and 44% (95% CI, 33-55) for Flu/Mel + ATG. (B) The 3-year probability of survival adjusted for age, performance score, HCT-CI, and disease risk index was 51% (95% CI, 46-56) for Bu4/Cy, 48% (95% CI, 43-53) for Flu/Bu4, 42% (95% CI, 36-48) for Flu/Bu4 + ATG, 47% (95% CI, 42-52) for Flu/Bu2, 41% (95% CI, 35-47) for Flu/Bu2 + ATG, 57% (95% CI, 50-64) for Flu/Mel, and 46% (95% CI, 34-57) for Flu/Mel + ATG.