Table 3.

Predictive performance of the intraoperative blood loss, postoperative drainage fluid volume, frequency of blood transfusion and Combined Index.

Variables	Cut-off	AUC (95% CI)	Sensitivity	Specificity	P-value
Intraoperative blood loss	0.2411	0.635 (0.551–0.713)	70.18%	53.93%	0.0028 *
Postoperative drainage fluid volume	0.4831	0.736 (0.657–0.806)	100%	48.31%	<0.0001 *
Frequency of blood transfusion	0.2917	0.658 (0.576–0.735)	56.14%	73.03%	0.0001 *
Combined Index	0.3641	0.731 (0.651–0.801)	54.39%	82.02%	<0.0001 *

AUC, areas under the curves; 95% CI, 95% confidence interval.

^*P <0.05.