Table 2.
Tooth-level analysis of factors affecting the PISA.
| Coefficient (95% CI) | p-Value | ||
|---|---|---|---|
| Patient-level variables | |||
| Age | −0.002 (−0.010–0.007) | 0.736 | |
| Sex | −0.076 (−0.225–0.074) | 0.320 | |
| Salivary levels of A. a (%) | −3.624 (−17.577–10.329) | 0.611 | |
| Salivary levels of P. g (%) | 0.669 (0.323–1.015) | <0.001 | |
| Salivary levels of P. i (%) | −0.028 (−0.230–0.173) | 0.782 | |
| Tooth-level variables | |||
| Mean CAL/teeth (mm) | 0.293 (0.266–0.320) | <0.001 | |
| PlI/teeth | 0.234 (0.157–0.310) | <0.001 | |
| Tooth mobility | 0 | Reference | |
| 1 | −0.044 (−0.136–0.048) | 0.348 | |
| 2 and 3 | 0.697 (0.472–0.923) | <0.001 | |
| Tooth-type | Mandibular anterior | Reference | |
| Mandibular premolar | −0.033 (−0.124–0.058) | 0.477 | |
| Mandibular molar | −0.016 (−0.105–0.074) | 0.732 | |
| Maxillary anterior | −0.116 (−0.197–−0.035) | 0.005 | |
| Maxillary premolar | 0.444 (0.359–0.530) | <0.001 | |
| Maxillary molar | 0.680 (0.590–0.770) | <0.001 | |
| Time | −0.004 (−0.022–0.014) | 0.632 | |
| Intercept | 1.516 (0.972–2.061) | <0.001 | |
Fitness index, AICC: 11,732.53; BIC: 11,745.40; PlI: Plaque index; CAL: Clinical attachment level; A. a: Aggregatibacter actinomycetemcomitans; P. g: Porphyromonas gingivalis; P. i: Prevotella intermedia; AICC = −2 L + 2 k (k − 1)/(n – k − 1); BIC = −2 L + k ln (n); L: Likelihood; k: Number of parameters; n: Sample size.