Prognostic significance of systemic immune-inflammation index in patients with intrahepatic cholangiocarcinoma undergoing hepatic resection

Figure 1 Violin plots showing the preoperative systemic immune-inflammation index level stratified by (A) status of hepatolithiasis, (B) tumor size, (C) tumor number, (D) status of lymph node invasion, and (E) TNM stage. ^aP < 0.05; ^bP < 0.01; ^eP < 0.001. SII: Systemic immune-inflammation index; TNM: Tumor-node-metastasis according to the 8^th edition of the American Joint Committee on Cancer Staging Manual.