CD4 and AIDS: Those excluded due to lack of baseline measurements (n = 1608) were more likely to be female (12.6% vs. 8.1%), non-MSM (36.2% vs. 32.3%), non-white (7.2% vs. 6.5%), with clinical AIDS (8.8% vs. 7.1%), and with lower median CD4 cell count (306 vs. 325 cells/μL) at baseline (Supplementary Table S1).