CD4 and tuberculosis: The PAF obtained for the independent risk factors obtained from the logistic regression analysis (Table 4) suggested male gender to have the highest contribution to IHM (PAF=0.22) followed by unknown CD4 cell count (PAF=0.14), tuberculosis (PAF=0.12), renal failure (PAF=0.06) and CD4 cell count <350 cells/mm3 (PAF=0.01).