Table 6.
Predictive accuracy of the various staging systems. A high concordance index in better, a low brier score is better
| Concordance index | Brier scorea | |
|---|---|---|
| Entire cohort | ||
| AJCC substages—7th | 0.57 | 0.24 |
| AJCC substages—8th | 0.58 | 0.23 |
| AJCC main stages—7th | 0.59 | 0.24 |
| AJCC main stages—8th | 0.61 | 0.24 |
| Subgroup—curative-intent resection | ||
| AJCC substages—7th | 0.65 | 0.15 |
| AJCC substages—8th | 0.67 | 0.15 |
| AJCC main stages—7th | 0.65 | 0.15 |
| AJCC main stages—8th | 0.64 | 0.15 |
| Subgroup—no resection | ||
| AJCC substages—7th | 0.54 | 0.22 |
| AJCC substages—8th | 0.57 | 0.22 |
| AJCC main stages—7th | 0.56 | 0.23 |
| AJCC main stages—8th | 0.57 | 0.22 |
aBrier score calculated for 1 year for both the total cohort and the no resection subgroup and calculated for 3 years in the curative-intent resection subgroup