^a)Interaction between ATG total dose and disease risk index.

Abbreviations: ALL, acute lymphoblastic leukemia; AML, acute myeloid leukemia; ATG, antithymocyte globulin; CD34+, cluster of differentiation 34-positive; CI, confidence interval; HCT-CI, hematopoietic cell transplantation comorbidity index; HID, haploidentical familial donors; MDS, myelodysplastic syndrome; MUD, matched unrelated donors; OS, overall survival; PUD, partially-matched unrelated donors.