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Table 1 Covariates in the logistic regression model.

From: Weekend admission to hospital has a higher risk of death in the elective setting than in the emergency setting: a retrospective database study of national health service hospitals in England

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
  1. † Only applicable for the elective admissions models