| 组别 | 例数 | 优 | 良 | 中 | 差 | 优秀率 |
| 观察组 | 30 | 23 | 4 | 2 | 1 | 23 (76.6%) |
| 对照组 | 30 | 13 | 8 | 4 | 5 | 13 (43.3%) |
| χ2值 |
|
|
|
|
| 3.814 |
| P值 |
|
|
|
|
| 0.0013 |