Overall survival: HLA-matched sibling transplant. (A) HLA-matched sibling transplant: survival according to conditioning regimen adjusted for age and recipient CMV serostatus. The 5-year probabilities of survival after Flu/Cy/ATG, Cy/ATG, Cy ± Flu, and Bu/Cy were 91% (95% CI, 85-96), 91% (95% CI, 89-94), 80% (95% CI, 73-87), and 84% (95% CI, 75-91), respectively (P = .001). (B) HLA-matched sibling transplant: survival according to age adjusted for conditioning regimen and recipient CMV serostatus. The 5-year probabilities of survival in patients aged ≤30 years and >30 years were 91% (95% CI, 89-93) and 81% (95% CI, 76-87; P < .001).