Table 4

Odds ratios for Elixhauser and Dr Foster global frailty score after multivariable adjustment for age, gender and country with both scores in model

Outcome	Population	Score	OR	Lower CI	Upper CI	P value
In-hospital mortality	Elective	Elixhauser	1.283	1.263	1.304	<0.001
	Elective	Frailty	1.114	1.085	1.144	<0.001
	Non-elective	Elixhauser	1.123	1.119	1.126	<0.001
	Non-elective	Frailty	1.058	1.052	1.065
30 day non-elective readmission	Elective	Admission history*	1.273	1.234	1.314	<0.001
		Elixhauser	1.142	1.128	1.157	<0.001
		Frailty	1.032	0.988	1.077	0.160
	Non-elective	Admission history*	1.240	1.228	1.252	<0.001
		Elixhauser	1.045	1.042	1.048	<0.001
		Frailty	1.024	1.000	1.049	0.052
Upper quartile length of stay	Elective	Elixhauser	1.081	1.077	1.085	<0.001
	Elective	Frailty	1.243	1.227	1.260	<0.001
	Non-elective	Elixhauser	1.055	1.053	1.056	<0.001
	Non-elective	Frailty	1.137	1.131	1.142	<0.001

↵*Admission history included in multivariable model exploring 30 day non-elective readmission.