Adjusted probability of DFS in 694 adult MDS patients by donor source. In multivariate analysis, the risk of treatment failure (death or relapse) was significantly higher with 7 of 8 MUD HCT recipients compared with MRD and 8 of 8 MUD HCT recipients (RR 1.47 [95% CI 1.10-1.96] and 1.29 [95% CI 1.00-1.66], respectively). The risk was not different between 8 of 8 MUD and MRD HCT recipients (RR 1.13, 95% CI 0.91-1.42).