Estimated effect of hepatitis B or C co-infection on CD4 count change after initiation of antiretroviral treatment.

aLinear mixed effects model. The coefficient assesses the effect of the covariate (hepatitis B or C) on the slope (or change) of the CD4 count (unit: cells/μL/year); 95% confidence interval given in parentheses. bThe multivariate model included the following potential confounding factors: age, gender, baseline CD4 count, baseline hemoglobin, baseline body weight, baseline WHO clinical stage, type of NNRTI or NRTI used.