Statistical analyses
Descriptive statistics were reported as median and range for continuous variables and frequencies and proportions for categorical variables. Comparisons for baseline patient characteristics between white and black groups were performed using permutation chi-square test or median test depending on the data type. The primary endpoint, overall survival (OS), was defined as the duration of time from transplant to time of death or the date of the last follow-up reported to the CIBMTR database. The overall survival was characterized using Kaplan-Meier plots and the log-rank test was used to examine differences in survival by race and HLA-match within each race type. A P value of less than 0.05 was considered significant. All analyses were performed with SPSSĀ® statistical program version 25-26 (IBM Corp., Armonk, N.Y., USA) and R version 4.0 (R Core Team, 2020).