Table 3. Pairwise comparison and clinical parameter correlations of IL-21 levels.
| Clinical parameters | Outcome parameter | IL-21 level | ||
|---|---|---|---|---|
| HG | GAP | GCP | ||
| PI | Correlation | 0.07 | 0.08 | 0.03 |
| P-value | 0.80 | 0.75 | 0.91 | |
| GI | Correlation | 0.03 | 0.13 | 0.45 |
| P-value | 0.91 | 0.13 | 0.09 | |
| PD (mm) | Correlation | 0.25 | 0.96 | 0.92 |
| P-value | 0.37 | <0.05 | <0.05 | |
| CAL (mm) | Correlation | 0.49 | 0.93 | 0.96 |
| P-value | 0.07 | <0.05 | <0.05 | |
Statistically significant P-values are marked as bold text. IL-21: Interleukin-21, HG: Healthy gingiva, GAP: Generalized aggressive periodontitis, GCP: Generalized chronic periodontitis, PI: Plaque index, GI: Gingival index, PD: Probing depth, CAL: Clinical attachment level.