In the adjusted Poisson regression analysis including demographic and clinical parameters (Table 2; model 1) the risk of fatal and non-fatal non-AIDS was almost two-fold higher in patients currently classified as ID compared to those classified as non-ID (aRR 1.96, 95% CI 1.37–2.81, p<0.001) Point estimates were slightly lower in a model adjusted for demographic factors as well as baseline CD4 count (Table2; model 2). This evidence concerns the gene CD4 and AIDS.