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Cox proportional multivariate hazard models for OS
| Variables | Hazard ratio | 95 % CI | P value | |
|---|---|---|---|---|
| Age | >65 | 11.9 | 2.23–220.81 | 0.002 |
| Tumor size | >2 cm | 1.94 | 0.45–8.91 | 0.377 |
| Lymph node metastasis | Positive | 4.06 | 1.05–17.86 | 0.042 |
| PNI | ≦52.8 | 5.88 | 1.13–108.01 | 0.033 |
CI confidence interval, PNI prognostic nutritional index
