Table 4 Comparison of the performance of the eighth edition TNM staging system and the modified TNM staging system
|  | Linear trend χ2 (P value) | Likelihood ratio χ2 (P value) | AIC |
|---|---|---|---|
The eighth TNM system | 76.671 (< 0.001) | 74.252 (< 0.001) | 32,351.28 |
The modified TNM system | 102.796 (< 0.001) | 97.225 (< 0.001) | 32,195.19 |