Table 4.

Variable importance in final regression model

Variable	Wald test	VIM
Female Sex	0.84	0.20
Decreasing frailty score (JHACG)	0.19	1.32
Private insurance status	0.42	0.80
Increasing number of diagnoses	<0.0001*	5.79
Elective admission	<0.0001*	4.45
Nonroutine discharge	0.25	1.15
Neurological MDCs	<0.0001*	12.81

JHACG, Johns Hopkins Adjusted Clinical Groups; VIMs, variable importance metrics.

*Statistically significant in the final regression model.