Evaluation of the 7th edition of the TNM classification in patients with resected esophageal squamous cell carcinoma

Figure 1 Survival curves of patient subgroups stratified by pT, pN and pM descriptors according to the 7^th edition TNM classification. The 5-year survival rate, the number of patients in each subgroup, and the P-value for comparison between each adjacent subgroup are indicated. A: With respect to the pT descriptor, there were significant differences between each adjacent subgroup except between pT3 and pT4 (P = 0.405); B: With respect to the pN descriptor, there were significant differences between each adjacent subgroup; C: With respect to the pM descriptor, there were significant differences between pM0 and pM1.