Group I

Group II

Statistical Significance (Group I vs. Group II) (Independent samples “t”-test)

Mean

SD

Mean

SD

t’

p’

Base line

2.19^b,c

0.49

2.22^b,c

0.48

−0.315

0.754

4 weeks

1.17^a,c

0.27

0.99^a,c

0.20

3.730

<0.001

12 weeks

1.06^a,c

0.22

0.69^a,c

0.19

8.803

<0.001