Before

After

Grade

N

G0

GI

GIIa

GIIb

GIII

G0

26

21 (80.8%)

0 (0.0%)

5 (19.2%)

0 (0.0%)

0 (0.0%)

GI

134

1 (0.7%)

41 (30.6%)

15 (11.2%)

17 (12.7%)

60 (44.8%)

GIIa

27

0 (0.0%)

6 (22.2%)

3 (11.1%)

6 (22.2%)

12 (44.4%)

GIIb

13

0 (0.0%)

1 (7.7%)

2 (15.4%)

5 (38.5%)

5 (38.5%)

GIII

1

0 (0.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

1 (100%)

^P

<0.001*