Overall survival by donor availability with the hazard ratio (HR) plots for study group, risk, and age subgroups. The percentage reduction is equal to 100 × (1 − HR). Patients without cytogenetics are not included in a cytogenetic risk subgroup. The not-favorable cytogenetic group consists of all patients without favorable cytogenetics (see legend Figure 5 for subgroup classification). The pooled estimates of the HR of donor availability for all patients irrespective of age and or cytogenetic subgroup for OS is 0.87 (95% CI, 0.79-0.97; P = .01) and 0.84 for the group of patients without favorable cytogenetics (95% CI, 0.74-0.95; P < .01).