Chi-square

Groups

P-value

X²

III

N = 50

II

N = 50

I

N = 50

<0.051*

13.43

37 (74%)

42 (84%)

47 (94%)

<15%

% RBL

10 (20%)

6 (12%)

3 (6%)

15% - 33%

3 (6%)

2 (4%)

0 (0%)

>33%

0.063*

9.82

38 (76%)

44 (88%)

46 (92%)

Absent

Tooth mobility

12 (24%)

6 (12%)

4 (8%)

Present