CD4 and tuberculosis: However, the increase in counts was significantly higher (Z score: −2.01; P=0.04) in the HIV-only patients (increment in mean CD4 levels=125.26±191.48 cells mm−3, t=4.626, P value<0.001) than that in HIV-TB co-infected patients (increment in mean CD4 levels=90.57±165.60 cells mm−3, t=4.019, P value<0.001) (Fig. 1).