Table 6. Two-Way ANOVA Repeated Measures Analysis for the Comparison of Extent of Gingival Pigmentation Through Time Between Laser and Cryosurgery .
| Source | df | Mean Square | F Value | P Value |
| Treatment*Time | 6 | 0.376 | 8.778 | 0.000 |
| Error | 84 | 0.043 |
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