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Comparison of the performance of our refined model and 8th AJCC staging system
| c-index | likelihood ratio ×2 test | |||
|---|---|---|---|---|
| 8th AJCC | RPA model | 8th AJCC | RPA model | |
| training cohort of SEER | 0.577 | 0.606 | 345.4 | 547.2 |
| internal validation cohort of SEER | 0.583 | 0.597 | 157.2 | 208.1 |
| external validation cohort of SYSUCC | 0.558 | 0.565 | 2.64 | 4.24 |
