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| Variables | Conventional model | Extended model | P |
|---|---|---|---|
| Variables in the model | pT stage | pT stage | |
| pN stage | pN stage | ||
| Anatomic region of MLNs | |||
| Harrell's C-index | 0.7414 | 0.7419 | 0.912 |
| −2 log-likelihood | 9,516.19 | 9,511.62 | 0.033 |
MLNs = metastatic lymph nodes.
