Variable | Training cohort | External validation cohort | ||||
---|---|---|---|---|---|---|
HR | 95% CI | P value | HR | 95% CI | P value | |
T stage (≤ T2 vs. ≥ T3) | 1.513 | 0.975–2.347 | 0.065 | 1.830 | 1.123–2.980 | 0.015 |
N stage (N0 vs. N +) | 11.502 | 6.155–21.494 | < 0.001 | 13.541 | 7.774–23.588 | < 0.001 |
M stage (M0 vs. M1) | 1.448 | 1.1161–1.805 | 0.001 | 1.218 | 0.971–1.528 | 0.088 |
Pathological grade (G1–2 vs. G3) | 1.250 | 0.671–2.329 | 0.481 | 0.894 | 0.533–1.500 | 0.894 |
Lymphovascular embolization (yes vs. no) | 1.587 | 1.253–2.011 | 0.001 | 1.359 | 1.029–1.796 | 0.031 |
Perineural invasion (yes vs. no) | 1.088 | 0.841–1.407 | 0.522 | 1.242 | 0.944–1.634 | 0.121 |