| Group | N | Hemadostenosis | Vascular Occlusion | Thrombosis | Intimal Thickening and Plaque |
| Observation group | 48 | 41 (85.42) | 11 (22.92) | 5 (10.42) | 45 (93.75) |
| Control group | 48 | 5 (10.42) | 0 (0.00) | 0 (0.00) | 7 (14.58) |
| X2 |
| 112.695 | 28.887 | 10.993 | 126.234 |
| P |
| 0.000 | 0.000 | 0.000 | 0.000 |