| 组别 | 例数 | 比例 |
| A组(n = 16) | 11 | 68.75% |
| B组(n = 40) | 38 | 95.00% |
| C组(n = 63) | 58 | 92.06% |
| χ2 | - | 7.200 (B、A组) |
| 0.333 (B、C组) | ||
| P | - | 0.025 (B、A组) |
| 0.086 (B、C组) |