New metastatic lymph node classification for early gastric cancer should differ from those for advanced gastric adenocarcinoma: Results based on the SEER database

Figure 2 X-tile analysis of survival data from the Surveillance, Epidemiology, and End Results registry reveals a continuous distribution based on the number of metastatic lymph nodes. A-C: The optimal cut-point highlighted by the black circle (C) is shown on a histogram of the entire cohort (B), and a Kaplan-Meier plot (A). P-values were determined by using the cut-point. It shows that the optimal cutoff point of the N category is 6 (χ² = 165.38, P < 0.001). LNs: Lymph nodes.