Univariate and multivariate analyses of risk factors for incident tuberculosis (TB) during antiretroviral therapy.

ART, antiretroviral therapy; TB, tuberculosis; IRR, incident rate ratio; CI, confidence interval. All p-values were calculated using the likelihood ratio test. There were no interactions between variables in the multivariate analysis.aAge is included as continuous variable, the IRR represents a 1 year increase in age.bMeasurement taken at ART enrolment, data missing for 103 patients.cMeasurement taken at ART enrolment, data missing for 116 patients.dCD4 cell counts and viral load are time-updated variables using serial measurements taken during ART.eAny previous episodes of TB, including prior to ART enrolment, a time-updated variable.fdata for all 1544 patients included in final model.