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Final Cox’s regression model (P-value of the model < 0.001), Log likelihood = -347.75
| Parameter | Hazard ratio | 95% CI | P |
| Nodal status | 1.87 | 1.43-2.44 | < 0.001 |
| Metastatic status | 7.50 | 3.89-14.43 | < 0.001 |
| OSD | 0.51 | 0.31-0.83 | 0.007 |
OSD: Overall staining density.
