In the unadjusted analyses predictors of attendance in the three age groups were: 30 years: Calendar period after 2002 and HIV RNA < 500 copies/mL; 40 years: Heterosexual route of infection, calendar period after 2002, HIV RNA < 500 copies/mL and CD4 count > 350 cells/μL; 50 years: HIV RNA < 500 copies/mL (Table 3). This evidence concerns the gene CD4 and infection.