Nomograms for pre- and postoperative prediction of long-term survival among proximal gastric cancer patients: A large-scale, single-center retrospective study

Figure 1 Flow chart depicting the patient selection process.

Figure 2 X-tile used to confirm the cutoff values for CEA (A) and CA19-9 (B).

Figure 3 Preoperative nomogram for predicting overall survival in proximal gastric cancer patients after operation (C-index = 0. 751).

Figure 4 Postoperative 3-year and 5-year overall survival rate calibration curves. A: Training set calibration curve for the preoperative nomogram for predicting the 3-year OS; B: Validation set calibration curve for the preoperative nomogram for predicting the 3-year OS; C: Training set calibration curve for the preoperative nomogram for predicting the 5-year OS; D: Validation set calibration curve for the preoperative nomogram for predicting the 5-year OS. OS: Overall survival.

Figure 5 Survival curve cutoff points for the preoperative nomogram quartiles.

Figure 6 Nomogram for predicting overall survival in postoperative proximal gastric cancer patients (C-index = 0. 754).

Figure 7 Postoperative nomogram 3-year and 5-year overall survival rate calibration curves. A: Calibration curve for the postoperative nomogram for predicting the three-year OS using the training set; B: Calibration curve for the postoperative nomogram for predicting the three-year OS using the validation set; C: Calibration curve for the postoperative nomogram for predicting the five-year OS using the training set; D: Calibration curve for the postoperative nomogram for predicting the five-year OS using the validation set. OS: Overall survival.

Figure 8 Survival curve cutoff points for the postoperative nomogram quartiles.