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

Figure 1 Kaplan-Meier curve for overall survival before and after propensity-scoring matching. A: Survival difference between the number of removed lymph node > 21 and ≤ 21 before propensity-scoring matching; B: Survival difference between two cohorts after propensity-scoring matching. LN: Lymph nodes.

Figure 2 Nomogram integrating number of resected lymph nodes for overall survival in patients with esophageal squamous cell carcinoma. NRLN: Number of resected lymph nodes; OS: Overall survival.

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.

Figure 4 Survival differences between the adjuvant chemotherapy group and non-adjuvant chemotherapy group in different subgroup comparisons. LN: Lymph nodes.