Table 2.

ROC curve parameters

Predictor variables	Area under the curve (AUC)	Confidence interval (CI)	Sensitivity	Specificity	Youden index	Cut-off
Operation time	0.807	0.725-0.888	60.23%	93.33%	53.56%	99.5
PT	0.717	0.606-0.828	71.59%	66.67%	38.25%	12.5
APTT	0.733	0.625-0.841	87.50%	56.67%	44.17%	28.5
TT	0.791	0.711-0.871	80.68%	66.67%	47.35%	13.5

Notes: PT, Prothrombin Time; APTT, Activated Partial Thromboplastin Time; TT, Thrombin Time.