Fig. 6From: Prognostic impact of lymph node parameters in distal cholangiocarcinoma after pancreaticoduodenectomyThe X-tile software determined the optimal cutoff value of the lymph node metastasis rate was 0.13 (a) and overall survival curves (b) for patients with lymph node metastasis rate of < 0.13 and ≥ 0.13Back to article page