Table 3.

Life Table Survival Estimates Up to 36 Months since Being Lost among Patients on HIV Treatment at the Themba Lethu HIV Clinic

Interval (months)	Number Failed	Number Censored	Sample Size	Conditional Probability of Failure	Survival	95% Confidence Interval
0–2.9	248	0	1037.0	0.24	1	1
3–5.9	39	4	787.0	0.05	0.76	(0.73–0.79)
6–8.9	30	99	696.5	0.04	0.72	(0.70–0.75)
9–11.9	16	77	578.5	0.03	0.69	(0.66–0.72)
12–17.9	22	100	474.0	0.05	0.67	(0.64–0.70)
18–23.9	19	98	353.0	0.05	0.64	(0.61–0.67)
24–29.9	8	77	246.5	0.03	0.61	(0.57–0.64)
30–35.9	4	96	152.0	0.03	0.59	(0.55–0.62)
36	0	100	50.0	0.00	0.57	(0.54–0.61)