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. 2021 Aug 31;33(4):457–469. doi: 10.21147/j.issn.1000-9604.2021.04.03

Table 4. Comparison of C-index between our modified staging system and the AJCC 8th TNM staging system at 1-, 2-, 3-year in validation cohort.

CSS Modified the AJCC 8th P
C-index 95% CI C-index 95% CI
AJCC, American Joint Committee on Cancer; CSS, cancer specific survival; 95% CI, 95% confidence interval.
1-year 0.576 0.520−0.632 0.554 0.497−0.611 0.698
2-year 0.615 0.555−0.674 0.601 0.541−0.660 0.886
3-year 0.815 0.722−0.909 0.742 0.622−0.862 0.005