CD4 and AIDS: For AIDS patients, the three leading factors most strongly related to AIDS-associated death were having received HAART, compared to not having received HAART (HR 0.176, 95% CI 0.144–0.217), having been diagnosed with AIDS within one year of being diagnosed with HIV, compared to diagnosed with AIDS more than one year of HIV diagnosis (HR 4.260, 95% CI 3.344–5.426), and last CD4+ T-cell count (100–199 cells/mm3: HR 0.160, 95% CI 0.125–0.204; 200–499 cells/mm3: HR 0.059, 95% CI 0.045–0.079; ≥500 cells mm3: HR 0.034, 95% CI 0.017–0.068, compared to CD4+ T-cell count <100 cells/mm3) (Table 2).