Table 11. Life table for immunological failure among patients on anti-retroviral therapy (n = 1,282).

Period	# at follow-up start	# with failure	Censored	Event free Survival	95% Confidence Interval
0–1	1282	67	52	0.95	0.93–0.96
1–2	1163	60	184	0.89	0.87–0.91
2–3	919	33	170	0.86	0.84–0.88
3–4	716	21	181	0.83	0.80–0.85
4–5	514	18	143	0.80	0.77–0.82
5–6	353	16	144	0.75	0.72–0.78
6–7	193	8	92	0.71	0.67–0.75
7–8	93	3	71	0.67	0.61–0.73