Note: BP = bacterial pneumonia; CI = confidence interval; HAART = highly active antiretroviral therapy; IDU = intravenous drug use; MSM = men who have sex with men; OR = odds ratio; PCP = Pneumocystis
Abbreviations: T0, time of first viral load result using the ultrasensitive Taqman assay (study entry); TND, target not detected; NNRTI, non-nucleoside reverse transcriptase inhibitor.a4 missing value