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Results of multivariate analysis
| Clinical features | B | Wald | P | Exp (B) | Exp (B) 95% CI |
| Age | – 0.607 | 4.841 | <0.05 | 0.545 | (0.317, 0.936) |
| AJCC stage | – 0.948 | 11.510 | <0.05 | 0.388 | (0.224, 0.670) |
| Differentiation | 0.602 | 4.494 | <0.05 | 1.825 | (1.046, 3.182) |
| Fer | 0.674 | 5.530 | <0.05 | 1.962 | (1.119, 3.439) |
| LNM | 1.072 | 7.307 | <0.05 | 2.921 | (1.343, 6.353) |
