Optimal extent of lymphadenectomy improves prognosis and guides adjuvant chemotherapy in esophageal cancer: A propensity score-matched analysis

Figure 3 Indices assessing the prognostic ability of nomogram. A: Calibration curve predicting 3-year and 5-year overall survival (OS); B: 3-year OS and 5-year OS receiver operating characteristic curves curve; C: Decision curve analysis; D: 5-fold internal cross-validation. OS: Overall survival; DCA: Decision curve analysis; AUC: Area under the receiver operating characteristic curve; ROC: Receiver operating characteristic curve; NRLN: Number of resected lymph nodes; NA: Not applicable.