Table 5. Multivariate logistic regression analysis of tooth-specific variables in relation to AP in restored teeth.
| Variables | Odds ratio | 95% CI | P value |
|---|---|---|---|
| Type of restoration | |||
| Amalgam | 1 | Reference | |
| Composite | 0.918 | 0.672 to 1.255 | 0.593 |
| Crown | 3.390 | 2.181 to 5.269 | <0.001 |
| Marginal integrity of tooth restoration | |||
| Adequate | 1 | Reference | |
| Inadequate | 1.359 | 0.780 to 2.368 | 0.279 |
| Recurrent caries | |||
| No | 1 | Reference | |
| Yes | 4.666 | 2.769 to 7.862 | <0.001 |
| Tooth type | |||
| Incisors and canines | 1 | Reference | |
| Premolars | 1.725 | 1.217 to 2.446 | 0.002 |
| Molars | 1.242 | 0.870 to 1.772 | 0.232 |
| Marginal bone loss | |||
| <1/3 root length | 1 | Reference | |
| >1/3 root length | 1.026 | 0.784 to 1.344 | 0.850 |
CI-confidence interval