Table 2. Bonferroni post hoc pairwise comparison of interleukin-21 levels between groups.
| A | B | Mean difference (A-B) | Std. error | P-value | 95% confidence interval | |
|---|---|---|---|---|---|---|
| Lower bound | Upper bound | |||||
| HG | GAP | −5.31 | 0.33 | 0.000 | −6.12 | −4.49 |
| GCP | −5.94 | 0.33 | 0.000 | −6.76 | −5.13 | |
| GAP | HG | 5.31 | 0.33 | 0.000 | 4.49 | 6.12 |
| GCP | −0.64 | 0.33 | 0.176 | −1.45 | 0.18 | |
| GCP | HG | 5.94 | 0.33 | 0.000 | 5.13 | 6.76 |
| GAP | 0.64 | 0.33 | 0.176 | −0.18 | 1.45 | |
Statistically significant P values are marked as bold text. HG: Healthy gingiva, GAP: Generalized aggressive periodontitis, GCP: Generalized chronic periodontitis.