Overall survival: URD transplant. (A) URD transplant: survival according to conditioning regimen adjusted for age and ATG source. The 5-year probabilities of survival with Cy/ATG/TBI 200 cGy, Flu/Cy/ATG/TBI 200 cGy, Flu/Cy/ATG, and Cy/ATG were 77% (95% CI, 69-84), 80% (95% CI, 73-85), 75% (95% CI, 64-85), and 72% (95% CI, 59-84), respectively (P = .61). (B) URD transplant: survival according to age adjusted for conditioning regimen and ATG source. The 5-year probabilities of survival in patients aged ≤30 years and >30 years were 81% (95% CI, 76-85) and 66% (95% CI, 57-75; P = .003).