CD4 and tuberculosis: Severe immunosuppression (CD4 cell count ≤ 50 cells/μL) at baseline (aHR 2.3; 95% CI 1.4 – 3.7) and active tuberculosis upon enrollment (aHR 1.8; 95% CI 1.0 – 3.6) were independent predictors of cohort losses to follow-up within the first 6 months after HAART initiation.