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Table 2 Population attributable fractions (PAF in %) with 95% credible intervals (CrI in %) of identified risk factors

From: A prospective case–control and molecular epidemiological study of human cases of Shiga toxin-producing Escherichia coli in New Zealand

Variable Cases (n) Proportion of cases (p) Adjusted odds ratioa PAF (95% CrI)b
For children 0–4 years old: Other household member having contact with animals other than household pets     
 No 28 0.549 Ref -
 Yes 23 0.451 4.03 16.82 (9.0–23.7)
Cattle livestock present in meshblock     
 No 74 0.655 Ref -
 Yes 39 0.345 1.89 18.20 (0.6–29.4)
Contact with animal manure     
 No 66 0.660 Ref -
 Yes 34 0.340 2.09 17.47 (4.4–27.7)
Contact with recreational waters     
 No 97 0.866 Ref -
 Yes 15 0.134 2.95 9.41 (2.7–16.5)
Travelled to areas in NZ with interrupted or no main water supply
 No 96 0.865 Ref -
 Yes 15 0.135 2.43 8.17 (0.7–15.7)
Water supply to home from private bore/spring/creek/or stream
 No 89 0.802 Ref -
 Yes 22 0.198 1.85 9.46 (-2.5–18.8)
  1. aAdjusted odds ratios were derived from multivariate logistic regression analysis model using multiple imputations by chained equations (Table 1).
  2. bPAF and 95% CrI were computed based on 1000 simulations.
  3. Ref = reference level for comparison.