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Comparison of survival curves in 3 staging system according to the number of lymph nodes retrieved. aP < 0.05 between adjacent stages. A: MLR, LN < 10; B: LODDS, LN < 10; C: pN, LN < 10; D: MLR, 10 ≤ LN ≤ 15; E: LODDS, 10 ≤ LN ≤ 15; F: pN, 10 ≤ LN ≤ 15; G: MLR, LN > 15; H: LODDS, LN > 15; I: pN, LN > 15. MLR: Metastatic lymph node ratio; LODDS: Log odds of positive lymph nodes; pN: Positive lymph nodes; LN: Examined lymph nodes.
