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Predictive accuracy of the 6th and 7th edition AJCC staging system
| Accuracy | AJCC edition | T classification | N classification | Stage group |
|---|---|---|---|---|
| Concordance | 6th ed. | 0.666 (P = 0.36) | 0.659 (P = 0.03) | 0.711 (P < 0.01) |
| 7th ed. | 0.667 | 0.665 | 0.697 | |
| Brier score | 6th ed. | 0.165 | 0.165 | 0.158 |
| 7th ed. | 0.163 | 0.164 | 0.156 |
For concordance, higher is better. For Brier score, lower is better
