Explanatory variables | Unadjusted PR (95%CI) | p | Adjusted PR (95%CI) | P |
---|---|---|---|---|
Variables related to the patient (3rd level) | Â | Â | Â | Â |
Sex (ref.: male) | Â | Â | * | Â |
 Female | 1.10 (0.82–1.48) | 0.512 |  |  |
Age (ref.: up to 30 yrs-old) | Â | Â | * | Â |
 More than 30 yrs-old | 0.95 (0.68–1.32) | 0.751 |  |  |
DMF-T (quant. variable) | 1.01 (0.99–1.03) | 0.233 | * |  |
Caries activity (ref.: no) | Â | Â | Â | Â |
 Yes | 1.39 (1.05–1.85) | 0.023 | 1.38 (1.07–1.76) | 0.012 |
Variables related to the restored tooth (2nd level) | Â | Â | Â | Â |
Type of teeth (ref.: Molars) | Â | Â | * | Â |
 Premolars | 1.17 (0.91–1.51) | 0.228 |  |  |
Dental arch (ref.: upper) | Â | Â | * | Â |
 Lower | 0.90 (0.71–1.14) | 0.373 |  |  |
Number of surfaces restored (ref.: 1 surface) | Â | Â | Â | Â |
 2 surfaces | 1.98 (1.51–2.60) | < 0.001 | 1.78 (1.35–2.33) | < 0.001 |
 3 or more surfaces | 3.14 (2.34–4.21) | < 0.001 | 2.58 (1.92–3.47) | < 0.001 |
Dental material (ref.: amalgam) | Â | Â | Â | Â |
 Composite resin | 2.52 (1.91–3.33) | < 0.001 | 1.96 (1.48–2.60) | < 0.001 |
Variables related to the clinical evaluation (1st level) | Â | Â | Â | Â |
Diagnostic method (ref.: CARS) | Â | Â | Â | Â |
 FDI system | 4.24 (3.18–5.66) | < 0.001 | 4.20 (3.15–5.61) | < 0.001 |
Order of examinations (ref.: 1st examination) | Â | Â | Â | Â |
 2nd examination | 1.13 (0.90–1.42) | 0.280 | 1.12 (0.89–1.40) | 0.331 |