Figure 6. Stratification analysis and construction of a prognostic nomogram in patients. (A–J) Kaplan–Meier analysis of the subgroups including (A) ≤ 60 years, (B) > 60 years, (C) female, (D) male, (E) stage I-II, (F) stage III-IV, (G) N0, (H) N1-3, (I) T1-2, and (J) T3-4. (K) OS predictive nomogram.