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Comparison of mean gingival index scores between different time intervals in Group 3 using Friedman’s test
| Group | Time | n | Mean±SD | Minimum | Maximum | P |
|---|---|---|---|---|---|---|
| Group 3 | Before | 30 | 0.53±0.17 | 0.3 | 0.8 | <0.001* |
| 7 days | 30 | 0.79±0.17 | 0.5 | 1.0 | ||
| 30 days | 30 | 1.06±0.38 | 0.5 | 2.0 | ||
| 6 months | 30 | 1.15±0.36 | 0.8 | 2.0 |
*Statistically significant at P<0.05. Group 3 – Fluoridated group; SD – Standard deviation; n – Number of subjects; P – Probability value
