Table 4.
Cox Regression model for DCR-RPDs with spark-eroded friction pins
| Variables | B | p-value | Exp(B) | 95% Confidence interval of Exp (B): Upper Lower |
|
|---|---|---|---|---|---|
| Gender- female | 0.448 | 0.112 | 1.565 | 0.900 | 2.722 |
|
Localization Mandibula |
0.397 | 0.177 | 1.488 | 0.836 | 2.650 |
| Opposing dentition | < 0.05 α | ||||
| DCR-RPDs | −0.816 | < 0.05 α | 0.442 | 0.221 | 0.884 |
| Full dentures | −1.344 | < 0.01 α | 0.261 | 0.096 | 0.712 |
| Implant-supported RDPs | −1.869 | < 0.05 α | 0.154 | 0.033 | 0.728 |
| Kennedy-Class | < 0.01 α | ||||
| Kennedy-Class II | 1.139 | < 0.01 α | 3.123 | 1.581 | 6.169 |
| Kennedy-Class III | −0.644 | 0.329 | 0.525 | 0.144 | 1.916 |
| Number of abutments | 0.199 | ||||
| 3 to 4 abutments | −0.455 | 0.118 | 0.635 | 0.359 | 1.122 |
| 5 to 6 abutments | −0.685 | 0.517 | 0.504 | 0.064 | 3.993 |
| 7 and more abutments | 1.287 | 0.241 | 3.623 | 0.421 | 31.170 |
| Number of replaced teeth | < 0.001 α | ||||
| 7 to 10 | 1.386 | < 0.05 α | 4.000 | 1.354 | 11.822 |
| 11 and more | 2.889 | < 0.001 α | 17.982 | 5.684 | 56.883 |
B=coefficient; Exp(B)=hazard; Reference for the hazard is the respective missing subgroup;α=significant influence