Table 2.

C-index for 30-day mortality

No	Model	Training cohort		Validation cohort
		Number of models	C-index (95% CI)	Number of models	C-index (95% CI)
1	LR	7	0.8249 [0.7952; 0.8556]	6	0.8298 [0.8135; 0.8464]
2	RF	3	0.9051 [0.8914; 0.9191]	5	0.8118 [0.7903; 0.8340]
3	ANN	3	0.8478 [0.8262; 0.8699]	2	0.8181 [0.7828; 0.8549]
4	DT	4	0.7831 [0.6766; 0.9063]	1	0.7800 [0.7701; 0.7901]
5	SVM	3	0.8919 [0.8752; 0.9089]	3	0.8852 [0.8635; 0.9075]
6	NB	4	0.7992 [0.7429; 0.8598]
7	AdaBoost	1	0.8700 [0.8405; 0.9005]
8	BN	2	0.7712 [0.7351; 0.8091]
9	LDA	1	0.8410 [0.8069; 0.8766]
10	Other	2	0.6400 [0.5944; 0.6890]
11	Overall	30	0.8208 [0.7940; 0.8485]	17	0.8296 [0.8134; 0.8462]