CD4 and tuberculosis: In a multivariate model adjusted for age, sex, CD4 cell count, body weight, presence of tuberculosis, and cART, an antiretroviral regimen containing efavirenz and zidovudine combined with lamivudine (odds ratio (OR) 1.80, 95% CI 1.11-2.90, p = 0.016, compared to a nevirapine based regimen) was the only risk factor of treatment modification within the first year of cART.