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Table 4 Adjusted odds ratios for selected hospital covariates for 30-day and 365-day mortality multilevel models

From: Mortality after admission for acute myocardial infarction in Aboriginal and non-Aboriginal people in New South Wales, Australia: a multilevel data linkage study

  30-day mortality 365-day mortality
  AOR 95% CI p-value AOR 95% CI p-value
Added into adjusted a model separately
Remoteness of hospitalb
 Major city (ref) 1.00   <.001 1.00   <.001
 Inner regional 1.15 0.94-1.41   1.16 0.97-1.39  
 Outer regional 1.56 1.26-1.94   1.54 1.27-1.87  
 Remote/very remote 1.83 1.19-2.81   1.79 1.22-2.61  
Average acute admissions per year      
 Less than 1200 2.03 1.57-2.62 <.001 1.98 1.58-2.49 <.001
 1200-3899 1.72 1.39-2.13   1.55 1.28-1.88  
 3900-7084 1.36 1.08-1.70   1.32 1.07-1.62  
 7085-18399 1.14 0.96-1.35   1.14 0.97-1.34  
 18400 or more (ref) 1.00    1.00   
On-site angiography       
 Yes 0.74 0.64-0.86 <.001 0.72 0.63-0.83 <.001
 No (ref) 1.00    1.00   
  1. AOR, adjusted odds ratios; CI, confidence interval. Ref, referent group in the analysis.
  2. a Adjusted for Aboriginal status, age, sex, year of admission, comorbidities, remoteness of residence, socio-economic status, and a random hospital intercept, with hospital covariates added in one at a time to the model.
  3. b Accessibility/Remoteness Index of Australia (ARIA+) based on hospital postcode.