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Kaplan–Meier plots of clinicopathological analysis in training set and validation set. Survival analysis of training set based on (A) age: ≤65, >65, (B) stage: stage I-II and stage III-IV, (C) T: T1-2, T3-4, (D) N: N0, N1-3. Survival analysis of validation set based on (E) age: ≤65, >65, (F) stage: stage I-II and stage III-IV, (G) T: T1-2, T3-4, and (H) N: N0, N1-3.
