Superiority of metastatic lymph node ratio to the 7th edition UICC N staging in gastric cancer

Figure 2 Analysis of the 6th (A and B) and 7th (C and D) International Union Against Cancer N staging systems and metastatic lymph node ratio staging (E and F) stratified according to the number of lymph nodes retrieved. A: The 6th International Union Against Cancer (UICC) N staging in the ≤ 15 lymph nodes retrieved group: N0 vs N1, P < 0.001; N1 vs N2, P < 0.001; B: The 6th UICC N staging in the > 15 lymph nodes retrieved group: N0 vs N1, P = 0.008; N1 vs N2, P < 0.001; N2 vs N3, P = 0.720; C: The 7th UICC N staging in the ≤ 15 lymph nodes retrieved group: N0 vs N1, P < 0.001; N1 vs N2, P = 0.001; N2 vs N3, P < 0.001; D: The 7th UICC N staging in the > 15 lymph nodes retrieved group: N0 vs N1, P = 0.070; N1 vs N2, P = 0.433; N2 vs N3, P < 0.001; E: Metastatic lymph node ratio (MLNR) stage in the ≤ 15 lymph nodes retrieved group: MLNR0 vs MLNR1, P = 0.001; MLNR1 vs MLNR2, P < 0.001; MLNR2 vs MLNR3, P < 0.001; F: MLNR stage in the > 15 lymph nodes retrieved group: MLNR0 vs MLNR1, P = 0.001; MLNR1 vs MLNR2, P < 0.001; MLNR2 vs MLNR3, P = 0.038.