Fig. 1From: Drain fluid amylase as a predictor of postoperative salivary fistula in cases with benign parotid tumoursROC (Receiver operating characteristics) curve of DFA and postoperative salivary fistula. AUC (Area Under Curve) is 0.903, which indicates that DFA volume has a good predictive value. Based on Youden index, the optimal threshold DFA level is 51,124.5 U/L, with a high sensitivity (0.875) and a high specificity (0.889).Back to article page