| 组别 | 例数 | VAS评分等级 | Kruskal-Wallis H值 | P值 | ||
| 轻度疼痛 | 中度疼痛 | 重度疼痛 | ||||
| 实验组1*D | 100 | 93 (94%) | 6 (6%) | 1 (1%) | 48.26 | 0.034 (<0.05) |
| 实验组2* | 100 | 90 (90%) | 8 (8%) | 2 (2%) | ||
| 对照组 | 100 | 67 (67%) | 22 (22%) | 11 (11%) | ||