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Multivariate analysis of factors for 5-year disease-free survival rates
| Factor | Hazards ratio (CI) | P value |
| PT | 1.448 (1.081-1.940) | 0.013 |
| PN | 1.624 (1.264-2.088) | 0.000 |
| Preoperative S-CEA | 1.663 (1.127-2.455) | 0.010 |
| Differentiation | 1.347 (0.873-2.079) | 0.178 |
| Lymphovascular invasion | 1.738 (0.890-3.394) | 0.105 |
| Lymph nodes evaluated | 1.013 (0.780-1.316) | 0.925 |
PT: Pathologic T stage; PN: Pathologic N stage; CI: Confidence interval; S-CEA: Serum levels of carcinoembryonic antigen.
