Table 3.
Pearson's correlation coefficients between change of CAL and the independent variables in the all subjects (N = 45).
| Independent variables | r* between ΔCAL and the independent variables | P value |
|---|---|---|
| Variables at baseline | ||
| Age (years) | −0.058 | 0.707 |
| Teeth present (n) | 0.048 | 0.754 |
| PPD (mm) at baseline | −0.427 | 0.003 |
| CAL (mm) at baseline | −0.138 | 0.367 |
| BOP (%) at baseline | −0.048 | 0.752 |
| PCR (%) at baseline | 0.240 | 0.112 |
| ROM (CARR U) at baseline | 0.134 | 0.381 |
| BAP (μmol/L) at baseline | 0.004 | 0.982 |
| Differences of variables | ||
| ΔTeeth present (n) | −0.288 | 0.055 |
| ΔPPD (mm) | 0.583 | <0.001 |
| ΔBOP (%) | 0.021 | 0.891 |
| ΔPCR (%) | 0.115 | 0.450 |
| ΔROM (CARR U) | 0.078 | 0.609 |
| ΔBAP (μmol/L) | −0.085 | 0.599 |
Δ represents differences (value at follow-up minus value at baseline).
*Pearson's correlation coefficients.
N: number; SD: standard deviation; PPD: probing pocket depth; CAL: clinical attachment level; BOP: bleeding on probing; PCR: plaque control record; ROM: reactive oxygen metabolites; CARR U: Carratelli units; and BAP: biologic antioxidant potential.