| Characteristic | Experimental group (n=30) | Control group (n=30) |
|---|---|---|
| Sex | ||
| Male | 16 | 18 |
| Female | 14 | 12 |
| Age (yr) | ||
| <60 | 16 | 22 |
| ≥60 | 14 | 8 |
| Tumor location | ||
| Colon | 16 | - |
| Rectum | 14 | - |
| Stage | ||
| I | 7 | - |
| II | 12 | - |
| III | 11 | - |
| Node metastasis | ||
| Absent | 19 | - |
| Present | 11 | - |
| Vascular invasion | ||
| Absent | 25 | - |
| Present | 5 | - |
| Lymphatic invasion | ||
| Absent | 21 | - |
| Present | 9 | - |