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Sensitivity and specificity of a PLFEI value analyzed by ROC curve. The PLFEI value >−1.97 was used to predict FLF; its sensitivity and specificity were 100% and 68.8%, respectively. Area under the ROC curve was 0.885, standard error was 0.0709, and 95% confidence interval was from 0.837 to 0.923. FLF = fatal liver failure, PLFEI = preoperative liver functional evaluation index, ROC = receiver-operating characteristic.
