CD4 and AIDS: The Kaplan-Meier survival curve analysis for the post-HAART period showed a decrease in survival with increasing age (log-rank test for trend, p < 0.001); greater survival rates in heterosexuals followed by MSM and IDU (log-rank test, p < 0.001); and increase in survival rates with increasing schooling (log-rank test for trend p < 0.001) and CD4+ count at AIDS diagnosis (log-rank test, p < 0.001) (Figure 4).