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| Parameter | Risk ratio (95% CI) | Wald test |
|---|---|---|
| Age | 1.06 (1.03, 1.09) | P=0.0002 |
| Stage | ||
| 1–2 (reference) | 1.0 | |
| 3 | 3.23 (1.24, 8.40) | P=0.0160 |
| 4 | 11.8 (5.33, 26.2) | P<0.0001 |
| EGFR | ||
| Negative (reference) | 1.0 | |
| Positive | 1.81 (1.10, 2.99) | P=0.0197 |
A stepwise method was used for variable selection. EGFR expression, stage, and age were selected as significant prognostic factors.
