Groups

Mean

(±SD)

Comparison

p value

Group I (<6 months orthodontic treatment)

21.06

3.40

Group I and II

0.532

Group I and III

0.017*

Group II (6 - 12 months orthodontic treatment)

21.82

3.60

Group II and III

0.189

Group III (>12 months orthodontic treatment)

23.06

3.49