Difference in mm

Group I (45)

Group II (31)

x²

P

X = 0.0 mm

11 (24.4%)

7 (22.6%)

0.04

0.85

X = 0.25

9 (20%)

8 (25.8%)

0.10

0.75

X = 0.5

16 (35.6%)

12 (38.6%)

0.00

0.97

X = 0.75

5 (11.1%)

2 (6.5%)

0.08

0.77

X = 1 mm

3 (6.7%)

2 (6.5%)

0.00

0.97

X > 1 mm

1(2.2%)

0 (0%)

0.69

0.40