| 组别 | 1 d | 3 d | 6 d | 出院前 | P值1 | P值2 | P值3 |
| A轻度 | 8.03 ± 2.2 | 6.12 ± 2.3 | 5.12 ± 2.1 | 3.16 ± 1.9 | 0.04 | 0.03 | 0.00 |
| B中度 | 8.64 ± 1.8 | 7.89 ± 2.1 | 5.89 ± 2.4 | 4.07 ± 3.6 | 0.04 | 0.02 | 0.00 |
| C重度 | 9.27 ± 2.1 | 8.76 ± 3.4 | 6.78 ± 3.5 | 4.29 ± 3.3 | 0.06 | 0.03 | 0.01 |