Table 5.
Prognostic performance of each staging system
| Staging system | Likelihood Ratio (χ2) | Akaike Information Criteria |
|---|---|---|
| In the primary | ||
| 6th AJCC system | 97.045 | 2959.120 |
| 7th AJCC system | 104.395 | 2949.771 |
| New stage system | 148.857 | 2909.309 |
| In the validation | ||
| 6th AJCC system | 34.646 | 716.091 |
| 7th AJCC system | 34.130 | 714.607 |
| New stage system | 40.928 | 711.809 |
Note: Regarding discriminatory ability, homogeneity, and monotonicity of gradients, the model with the higher χ2 by the likelihood ratio test was considered the better model. Furthermore, the lower value of Akaike information criteria is considered the better model for discriminatory ability. American Joint Commission for Cancer Staging: AJCC.