Comparative Performance of the Complexity Classification and the Conventional Major/Minor Classification for Predicting the Difficulty of Liver Resection for Hepatocellular Carcinoma

Objective: To compare performances for predicting surgical difficulty and postoperative complications. Background: An expert panel recently proposed a complexity classification for liver resection with 3 categories of complexity (low, medium, or high). We compared this new classification with the conventional major/minor classification. Methods: We retrospectively reviewed 469 hepatocellular carcinoma patients who underwent liver resection between 1 January 1, 2004 and June 30, 2015. We used receiver-operating characteristic curve analysis to compare the performances of both classifications for predicting perioperative outcomes. Results: Both classifications effectively differentiated subgroups of patients in terms of their intraoperative findings and short-term outcomes, including blood loss, transfusion rate, operation time, and postoperative hospital stay (all P

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