| 组别 | 治疗前 | 1个月 | 3个月 | 6个月 |
| DRIL ≤ 500 μm组(n = 12) | 225.00 (162.50, 487.50) | 200.00 (152.50, 307.50) | 115.00 (100.00, 182.50) | 95.00 (0.00, 137.50) |
| DRIL > 500 μm组(n = 18) | 585.00 (400.00, 880.00) | 370.00 (337.50, 670.00) | 270.00 (197.50, 362.50) | 200.00 (0.00, 257.50) |
| Z | −3.264 | −3.668 | −3.022 | −2.241 |
| P | 0.001 | 0.001 | 0.003 | 0.025 |