In adjusted Cox proportional hazard models, older patients had a higher risk of death (adjusted hazard ratio (aHR) 1.64; 95% CI: 1.48 to 1.83) and a lower risk of virologic failure (aHR: 0.73; 95% CI: 0.63 to 0.84), after multiply imputing missing covariate values and adjusting for sex, presence of AIDS‐defining illness, intravenous drug use, ART regimen, time from HIV diagnosis to ART initiation, ART initiation year, and nadir CD4 count. Here, CD4 is linked to AIDS.