Table 4.

ROC analysis to determine the thresholds

Variables	AUC	Thresholds	Sensitivity	Specificity
HT (cm)	0.728	154.1	0.857	0.585
Length of surgery (minutes)	0.834	180.50	0.857	0.760
Amount of bleeding (ml)	0.726	355	0.714	0.767

AUC Area under the curve, HT Height