CD4 and AIDS: In the population studied, 63.0% (22,367/35,515) were male, 64.7% (22,963/35,515) belonged to the 30 to 49 years age group, while the mean and median age was 37.4, 95% CI (37.3–37.5) and 36 years, respectively; 64.4% (19,412/30,152) were white (self-reported), 97.2% (33,555/34,530) lived in the urban area, 52.7% (15,261/28,969) had more than 7 years of schooling, 12.9% (4581/35,515) were co-infected with TB, and 37.6% (11,228/29,855) had CD4 count below 200 cells/mm3 at AIDS diagnosis (Table 1).