Table 3. Median estimated time from seroconversion to CD4 cell count < 500, < 350, < 200 cell/mm³ by age.

Variable	CD4 < 500		CD4 < 350		CD4 < 200
	Male	Female	Male	Female	Male	Female
15-29y
Median (95% CI)	1.70 (0.23-3.25)	1.18 (0.00-3.16)	4.72 (3.17-6.35)	4.17 (2.23-4.23)	8.49 (6.85-10.22)	7.92 (5.88-10.07)
30-39y
Median (95% CI)	0.64 (0.00-2.19)	0.15 (0.00-4.07)	3.51 (1.96-5.14)	3.02 (0.00-7.04)	7.11 (5.47-8.82)	6.62 (2.74-10.75)
≥ 40y
Median (95% CI)	1.13 (0.00-3.08)	0.18 (0.00-1.78)	3.60 (1.70-5.62)	2.68 (1.10-4.37)	6.69 (4.73-8.79)	5.81 (4.15-7.61)
Total
Median (95% CI)	0.97 (0.04-1.93)	0.26 (0.00-1.61)	3.74 (2.76-4.74)	3.09 (1.75-4.48)	7.20 (6.17-8.25)	6.48 (5.12-7.89)