Figure 3. Analysis of the prognostic significance of the nomogram in EODGC patients. Kaplan–Meier curves of all-cause mortality for (A) all EODGC patients in the SEER database; (B) patients stratified by the mean point predicted by the nomograms in training cohort; (C) patients stratified by the mean point predicted by the nomograms in the internal validation cohort; (D) patients stratified by the mean point predicted by the nomograms in the RMHWHU validation cohort; and (E) Kaplan–Meier curve of recurrent-free survival for EODGC patients stratified by the mean point predicted by the survival nomograms in the RMHWHU validation cohort.