| 组别 | 治疗前 | 1个月 | 3个月 | 6个月 |
| DRIL ≤ 500 μm组(n = 12) | 306.00 (262.00, 407.50) | 247.00 (223.00, 266.50) | 210.00 (171.25, 267.50) | 180.00 (135.00, 227.50) |
| DRIL > 500 μm组(n = 18) | 514.50 (308.50, 739.25) | 337.50 (249.75, 438.75) | 267.50 (215.00, 400.50) | 227.50 (187.50, 272.50) |
| Z | −2.075 | −2.372 | −2.078 | −2.207 |
| P | 0.038 | 0.018 | 0.038 | 0.027 |