Predicting Intracerebral Hemorrhage Patients’ Length-of-Stay Probability Distribution Based on Demographic, Clinical, Admission Diagnosis, and Surgery Information

Table 2

The C-index of each model.

Model	Mean	SD	Paired sample t-test ( value)
			Model 1	Model 2	Model 3	Model 4
Model 1: univariable Cox RSF model	0.6763	0.0036	—	<0.001	<0.001	<0.001
Model 2: multivariable Cox RSF model	0.6834	0.0012	—	—	<0.001	0.336
Model 3: Cox-VIMP RSF model	0.6873	0.0012	—	—	—	<0.001
Model 4: intersection RSF model	0.6835	0.0010	—	—	—	—

RSF = random survival forests; SD = standard deviation; VIMP = value of importance. The original hypothesis was that there would be no significant differences among the models in the C-index. value < 0.01.