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Table 2 The final multivariable logistic regression model (with risk factors selected using AIC) with case/control classifications based on liver condemnations as the response variable (131 case and 63 control farms)

From: Farm-level risk factors for Fasciola hepatica infection in Danish dairy cattle as evaluated by two diagnostic methods

Variable Level Estimate SE P-value OR 95% CI
Intercept   -2.400 0.675    
Grazing of heifers (Not grazed, Dry grazing or Wet grazing) combined with access to surface water (No or Yes)     < 0.001   
Not grazed Ref    Ref  
Dry & Yes  -0.368 0.961   0.69 0.09–4.33
Dry & No 0.218 0.734   1.24 0.29–5.30
Wet & Yes 2.060 0.568   7.84 2.67–25.1
Wet & No 1.316 0.580   3.73 1.12–12.0
Herd size (per 100 animals)   0.396 0.001 < 0.001 1.49 1.20–1.90
Grazing of dry cows (Not grazed, Dry grazing or Wet grazing)     0.047   
Not grazed Ref    Ref  
Dry 0.274 0.433   1.31 0.56–3.09
Wet 1.443 0.637   4.23 1.31–16.7
Breed     0.102   
DH Ref    Ref  
Cross 1.265 0.851   3.54 0.80–25.8
Other -0.548 0.472   0.58 0.23–1.47
Beef production     0.113   
No Ref    Ref  
Yes 1.007 0.685   2.74 0.80–12.8
  1. Abbreviations: SE standard error, OR odds ratio, 95% CI 95% confidence interval, Ref reference