Table 5

Area under the receiver operator statistic curve for outcomes by Elixhauser score, Dr Foster global frailty score and population within global comparators data set

Global comparators dataset	Elixhauser		Dr Foster global frailty score		Elixhauser and Dr Foster global frailty score
Outcome/AUC	Elective	Non-elective	Elective	Non-elective	Elective	Non-elective
In-hospital mortality	0.80	0.69	0.70	0.62	0.81	0.69
30 day non-elective readmission*	0.67	0.64	0.64	0.63	0.67	0.64
Upper quartile length of stay	0.72	0.63	0.69	0.61	0.73	0.65

↵*Admission history included in multivariable model exploring 30 day non-elective readmission.
AUC, area under the receiver operator characteristic curves.