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| Categories | n | Hazard ratio | 95% Confidence interval | p value |
| Grade | ||||
| Low grade | 66 | Reference group | Reference group | Reference group |
| High grade | 21 | 3.4 | 2.8 to 4.1 | <0.05 |
| Stage | ||||
| M0 | 23 | Reference group | Reference group | Reference group |
| M1 | 49 | 1.9 | 1.6 to 2.4 | <0.05 |
| M2 | 15 | 5.8 | 4.5 to 7.5 | |
| Metastasis | ||||
| No | 8 | Reference group | Reference group | Reference group |
| Yes | 79 | 0.9 | 0.7 to 1.5 | 0.13 |
