Group

Excellent (case)

Good (case)

Fair (case)

Total cases

Excellent and good rate (%)

Excellent rate (%)

Control group

5

7

2

14

85.71

35.71

Observation group

11

2

1

14

92.86

78.57

χ²

χ² = 0.373

χ² = 5.250

P

0.54

<0.05