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Multivariate Cox regression analyses of disease-free survival
| Regression variables | Adjusted hazard ratio | 95% CI | P value |
|---|---|---|---|
| Pathological N stage | |||
| N0 | 1.00 | ||
| N1 | 1.65 | 1.19-1.88 | 0.038 |
| N2 | 2.58 | 2.14-3.87 | 0.003 |
| Differentiation grade | |||
| Good | 1.00 | ||
| Moderate | 1.25 | 0.55-2.00 | 0.258 |
| Poor | 2.55 | 1.44-3.35 | 0.005 |
