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Table 3 Multivariable Poisson regression model results estimating associations between explanatory variables and E. coli BSI 30-day mortality ratea

From: Mortality in Escherichia coli bloodstream infections: a multinational population-based cohort study

Variable aIRR 95% CI p-value
Region    0.035b
 Finland 1.00 referent  
 Calgary 0.99 0.89–1.09 0.796
 Sherbrooke 0.67 0.49–0.90 0.009
 Skaraborg 1.14 0.96–1.35 0.138
 Western interior 0.99 0.78–1.24 0.913
Sex
 Female 1.00 referent  
 Male 1.26 1.17–1.35 < 0.001
Age Category
 < 70-years-old 1.00 referent  
 ≥ 70-years-old 20.35 18.73–22.11 < 0.001
  1. Abbreviations: BSI Bloodstream infection, aIRR Adjusted incidence rate ratio, CI Confidence interval
  2. aModel fits the data based on normally distributed Anscombe residuals and lack of significant overdispersion (overdispersion parameter in negative binomial model [p = 0.302])
  3. bOverall p-value for variable estimated using a likelihood ratio test