Table 3 Overall Failure rates for the zirconia crowns from crown-level data.
Intervals (Months) | Total subjects | Events | Loss to follow-up | Cumulative Failure | Crowns without complications | SE | [95% conf. int.] | |
|---|---|---|---|---|---|---|---|---|
0 | 20 | 562 | 3 | 0 | 0.0053 | 0.9947 | 0.0031 | 0.9835, 0.9983 |
20 | 40 | 558 | 16 | 0 | 0.0339 | 0.9661 | 0.0076 | 0.9474, 0.9783 |
40 | 60 | 542 | 19 | 0 | 0.0677 | 0.9323 | 0.0106 | 0.9081, 0.9502 |
60 | 80 | 523 | 31 | 0 | 0.123 | 0.877 | 0.0139 | 0.8469, 0.9015 |
80 | 100 | 492 | 23 | 0 | 0.164 | 0.836 | 0.0156 | 0.8027, 0.8642 |
100 | 120 | 469 | 17 | 0 | 0.1943 | 0.8057 | 0.0167 | 0.7705,0.8361 |
120 | 140 | 452 | 18 | 2 | 0.2265 | 0.7735 | 0.0177 | 0.7366, 0.8060 |
140 | 160 | 432 | 21 | 32 | 0.2655 | 0.7345 | 0.0187 | 0.6957, 0.7692 |
160 | 180 | 379 | 6 | 263 | 0.2833 | 0.7167 | 0.0196 | 0.6761, 0.7531 |
180 | 200 | 110 | 1 | 105 | 0.2958 | 0.7042 | 0.0229 | 0.6567, 0.7465 |
200 | 220 | 4 | 0 | 4 | 0.2958 | 0.7042 | 0.0229 | 0.6567, 0.7465 |
