TABLE 4.
Comparison of cumulative abutment fracture rate according to different factors, and hazard ratio estimated from Multivariate Cox proportional hazard models at 9 years
| Factors | HR (95% CI) | p‐vaule |
|---|---|---|
| Gender | ||
| Male | 1 | 0.029* |
| Female | 0.185 (0.041 ~ 0.838) | |
| Type of the prosthesis | ||
| ISC | 1 | 0.049* |
| IFPD | 0.226 (0.048 ~ 1.074) | |
| Abutment design | ||
| Without index(C/) | 1 | 0.023* |
| Indexed (/X) | 4.887 (1.240 ~ 19.268) | |
| Diameter | ||
| 3.5 mm | 0.208 (0.057–0.758) | 0.017* |
| 4.5 mm | 1 | |
Note: Only the factors that were considered statistically significant (p < 0.05) in the univariate model and did not present multicollinearity were included in the multivariate model.
Abbreviations: CI, confidence interval; HR, hazard ratio.
*
p < 0.05.