Table 1.

Covariates in the logistic regression model.

Covariate (name in model)	Levels of covariate
Age Category (agegcat)	12 groups
Complex Elderly	1 = Yes, 0 = no
Male	1 = Yes, 0 = no
HRG with comorbidities/complications	1 = Yes, 0 = no
Admission on a weekend	1 = Yes, 0 = no
Interaction: Age Category and HRG with comorbidities/complications	12 interaction terms
Admission Quarter	1 = Apr-Jun; 2 = Jul-Sep; 3 = Oct-Dec; 4 = Jan-Mar
Zero day stay†	1 = Yes, 0 = no
Weekend Admission	1 = Yes, 0 = no

† Only applicable for the elective admissions models