Statistical analysis
The Statistical Program for Social Sciences (SPSS 23 for Windows) was employed for the statistical analysis. The Mann-Whitney-Wilcoxon rank-sum test was used to evaluate whether there was a significant difference in HBsAb levels between patient groups after transplantation. The χ² and Fisher exact tests were used to compare the difference in the HBsAb negative conversion rates between groups. The receiver operating characteristic (ROC) curve was used to evaluate the cutoff value of the pretransplant HBsAb titers for the prediction of HBsAb disappearance after HSCT. Multivariate analysis was performed using Cox regression.P < 0.05 (2-tailed) was identified as statistically significant.