Table 1.

C-index for in-hospital mortality

No	Model	Training cohort		Validation cohort
		Number of models	C-index (95% CI)	Number of models	C-index (95% CI)
1	LR	25	0.8603 [0.8330; 0.8886]	21	0.8576 [0.8284; 0.8878]
2	RF	9	0.8370 [0.7985; 0.8773]	12	0.8501 [0.8237; 0.8773]
3	ANN	10	0.8487 [0.8190; 0.8795]	2	0.9200 [0.9025; 0.9379]
4	DT	6	0.7957 [0.7390; 0.8567]	5	0.7691 [0.6674; 0.8864]
5	SVM	8	0.8491 [0.8048; 0.8958]	6	0.8737 [0.8551; 0.8927]
6	XGBoost	6	0.8953 [0.8526; 0.9401]	4	0.9295 [0.9094; 0.9500]
7	NB	1	0.8750 [0.8601; 0.8901]	2	0.8539 [0.8251; 0.8837]
8	KNN	1	0.7560 [0.7217; 0.7919]	1	0.9500 [0.9302; 0.9702]
9	Other	3	0.8416 [0.7825; 0.9051]
10	Overall	69	0.8491 [0.8337; 0.8649]	53	0.8633 [0.8467; 0.8802]