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

BMC Infectious Diseases

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

Variable	aIRR	95% CI	p-value
Region			0.035^b
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

Abbreviations: BSI Bloodstream infection, aIRR Adjusted incidence rate ratio, CI Confidence interval
^aModel fits the data based on normally distributed Anscombe residuals and lack of significant overdispersion (overdispersion parameter in negative binomial model [p = 0.302])
^bOverall p-value for variable estimated using a likelihood ratio test

ISSN: 1471-2334