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Sensitivity and specificity of a PLFEI value analyzed by ROC curve. The PLFEI value >−2.16 was used to predict POLD; its sensitivity and specificity were 90.30% and 73.5%, respectively. Area under the ROC curve was 0.879, standard error was 0.0261, and 95% confidence interval was from 0.830 to 0.918. PLFEI = preoperative liver functional evaluation index, POLD = postoperative liver dysfunction, ROC = receiver-operating characteristic.
