Kaplan-Meier product-limit estimate of survival according to prognosis factors (CD4 cell count ≤ 200 × 10⁶/L, ECOG > 2). (A) A indicates ECOG of 2 or less and CD4 count of 200 × 10⁶/L or lower (n = 3); B, ECOG of 2 or less and CD4 count higher than 200 × 10⁶/L (n = 21); C, ECOG more than 2 and CD4 count more than 200 × 10⁶/L (n = 20); and D, ECOG more than 2 and CD4 count of 200 × 10⁶/L or lower (n = 19). (B) According to prognosis index (PI), good PI = 0 or 1 factor (n = 44); poor PI = 2 factors (n = 19).