Sensitivity analyses and assumptions of different models in multivariate Cox proportional hazards regression analyses.

Adjusted hazard ratios (HR) of ART initiation after integration compared to before integration in alternative Cox proportional hazards models. The baseline model is the one presented in table 2 and includes the following variables: gender, age, CD4 count and previous TB initiation. SA, Sensitivity analysis; (n), number; SA 1: inclusion of the variables TB classification (pulmonary TB; extra-pulmonary TB; both pulmonary and extra-pulmonary TB) and TB patient category (new TB case; re-treatment TB case) into the model; SA 2: exclusion of patients transferred in from other TB services; SA 3: exclusion of patients with unknown exact ART initiation date during TB treatment; SA 4: patients with unknown exact ART initiation date during TB treatment assumed to have initiated ART in the middle of TB treatment; SA 5: categorization of continues variables (age, sex, TB Rx start outside of clinic); SA 6: only patients with CD4 cell counts ≤200 considered as according to national guidelines.