Multivariate analysis
Cox regression was performed to further evaluate the possible risk
factors for HBsAb disappearance within one year after PBSCT. The
following factors were included in the analysis: patient age, patient
sex, recipient pretransplant HBsAb titer, donor pretransplant HBsAb
titer, the administration of ATG, the administration of corticosteroids
and the presence of GVHD. Of all the variables, only recipient HBsAb
titers <207.5 IU/L before transplantation and the presence of
GVHD were significantly associated with HBsAb disappearance within one
year after HSCT (Table 2).