TABLE 2.

Discrimination of the models for mortality.

	Death-6 year			Death-1 year
	C-index	AUC	DeLong test	C-index	AUC	DeLong test
RF	0.56 (0.42–0.69)	0.58	0.0297*	0.67 (0.54–0.80)	0.68	0.6682
Step-forward	0.68 (0.59–0.82)	0.62	0.0126*	0.50 (0.36–0.64)	0.49	0.0011*
Lasso	0.83 (0.66–0.94)	0.78	1	0.77 (0.64–0.89)	0.75	1
Logistic	0.55 (0.41–0.69)	0.54	0.0051*	0.53 (0.40–0.66)	0.46	0.0095*
Ridge	0.52 (0.38–0.65)	0.53	0.0057*	0.51 (0.38–0.63)	0.52	0.0900
GBT	0.61 (0.45–0.73)	0.62	0.0530	0.76 (0.62–0.89)	0.77	0.9209
Elastic-net	0.54 (0.44–0.71)	0.55	0.0160*	0.54 (0.41–0.67)	0.54	0.2378
SVM	0.58 (0.47–0.69)	0.58	0.0036*	0.64 (0.54–0.75)	0.62	0.4207

GBT, gradient boosted trees; RF, random forest; SVM, support vector machine; AUC, area under the curve.

*Indicates p < 0.05.