Group

n

Mean

Std dev

Mean difference

    t

P-Value

Before treatment

25

1.70

0.23

      -0.365

-4.807

<0.001*

After treatment

25

2.07

0.35
*denotes significant difference
Table 3: Table depicting comparison of mean grades of gingival enlargement in the test group before and after 6 months of phenytoin treatment.