| Variables | HR | IC 95% | p | |
| Min | Max | |||
| Poor differentiation | 16.278 | 2.149 | 123.309 | 0.007 |
| Synchronous metastases (Stage 4) | 42.004 | 4.632 | 380.920 | 0.011 |
| Curative surgery | 0.172 | 0.032 | 0.923 | 0.001 |