Table 2.

Life table analysis for the uncemented ABG I prosthesis with revision of the acetabular component as the end point

Years since operation	Number at start	Number revised	Withdrawn	Death	Loss to followup	Number at risk	Annual failure rate (%)	Annual success rate (%)	Survival rate (%)	95% confidence interval
0–1	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
1–2	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
2–3	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
3–4	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
4–5	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
5–6	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
6–7	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
7–8	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
8–9	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
9–10	69	0	0	0	0	69	0	100.0	100.0	94.7–100.0
10–11	69	4	0	0	0	69	5.8	94.2	94.2	85.8–98.1
11–12	65	0	0	0	0	65	0	100.0	94.2	85.5–98.3
12–13	65	0	0	0	0	65	0	100.0	94.2	85.5–98.3
13–14	65	1	21	0	0	54.5	1.8	98.2	92.4	82.0–97.7
14–15	43	2	12	1	0	36.5	5.5	94.5	86.9	71.7–96.0
15–16	28	1	11	0	0	22.5	4.4	95.6	82.5	61.1–96.8
16–17	16	0	7	1	0	12	0	100.0	82.5	51.7–100.0