CD4 and AIDS: Having a non-response to HBV vaccine remained significantly associated with increased risk of AIDS or death in the two sensitivity analyses: with censoring at HAART initiation (Model 2 HR, 3.22; 95% CI, 1.36–7.66); and for the subset of participants with CD4 count ≥500 cells/mm3 at time of last HBV vaccination (Model 3 HR, 3.40; 95% CI, 1.39–8.32).