Risk factors associated with major adverse cardiac and cerebrovascular events following percutaneous coronary intervention: a 10-year follow-up comparing random survival forest and Cox proportional-hazards model

Table 5 Comparison of Cox regression and RSF models in different scenarios

Included variable	Model	C index	OOB error rate	IBS*
All 13 variables	Cox	0.626	0.374	0.135
All 13 variables	RSF	0.648	0.352	0.124
4 variables with significant unadjusted hazard ratios (diabetes, smoking, age, stent length)	Cox	0.670	0.328	0.126
6 variables with positive VIMP (diabetes, smoking, age, stent length, setting, hyperlipidemia	RSF	0.697	0.317	0.112
The same variables (diabetes, smoking, age, stent length)	Cox	0.670	0.328	0.126
The same variables (diabetes, smoking, age, stent length)	RSF	0.684	0.312	0.113

ISSN: 1471-2261