CD4 and tuberculosis: In the subgroup of patients with an initial CD4 cell count less than 350 cells/μL, ART had a stronger effect on mortality (HR = 0.10, 95% CI = 0.06–0.13) and the presence of tuberculosis (HR = 0.06, 95% CI = 0.03–0.08), and a weaker effect on CD4 cell count increase per month (5.23 cells/μL, 95% CI = 4.91–5.59).