Fig. 7

Analysis of independent prognostic factors. A The forest plot illustrated the univariate Cox regression analysis of risk score and clinical factors. B The forest plot illustrated the multivariate Cox regression analysis of risk score and clinical factors. C The nomogram based on risk score, clinical variables and survival rates at 1, 3, and 5 years. These clinical factors include age, N and T stages. D DCA curve for 1-, 3-, and 5-year risk prediction. E 1-, 3-, and 5-year risk prediction calibration curves. A line that closely aligns with the ideal dashed line indicated a more reliable result