Table 2.

Life-table survival analysis showing the cumulative survival rate of zirconia implants

Interval start time (years)	Number entering interval	Number withdrawing during interval	Number exposed to risk	Implant failures	ISR (%)	CSR (%)	SE
0	4017	31	4001.5	124	96.9	96.9	0.27
1	3862	799	3462.5	24	99.3	96.2	0.30
2	3039	248	2915.0	10	99.7	95.9	0.32
3	2781	665	2448.5	2	99.9	95.8	0.33
4	2114	113	2057.5	1	100.0	95.8	0.33
5	2000	462	1769.0	9	99.5	95.3	0.36
6	1529	67	1495.5	0	100.0	95.3	0.36
7	1462	206	1359.0	2	99.9	95.1	0.38
8	1254	210	1149.0	0	100.0	95.1	0.38
9	1044	138	975.0	0	100.0	95.1	0.38
10	906	151	830.5	0	100.0	95.1	0.38
11	755	152	679.0	0	100.0	95.1	0.38
12	603	105	550.5	0	100.0	95.1	0.38
13	498	160	418.0	0	100.0	95.1	0.38
14	338	226	225.0	0	100.0	95.1	0.38
15	112	112	56.0	0	100.0	95.1	0.38

ISR, interval survival rate (survival rate within each interval)

CSR, cumulative survival rate (cumulative proportion surviving at end of interval)

SE, standard error