Table 4.

The performance analysis of the comprehensive model based on Donor age and Length of ICU stay for predicting the 28-d LOS.

	Training set (60%)	Validation set (40%)
AUC (SD)	0.663 (0.067)	0.647 (0.036)
Cutoff (SD)	0.207 (0.031)	0.207 (0.031)
Accuracy (SD)	0.670 (0.011)	0.648 (0.034)
Sensitivity (SD)	0.636 (0.091)	0.727 (0.091)
Specificity (SD)	0.712 (0.015)	0.591 (0.106)
Positive predictive value (SD)	0.384 (0.027)	0.373 (0.039)
Negative predictive value (SD)	0.826 (0.026)	0.830 (0.022)

ICU = intensive care unit, LOS = length of hospital stay.