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Table 5 Multivariable logistic regression analyses of significant risk factors for fur animal epidemic necrotic pyoderma (FENP)

From: Questionnaire survey of detrimental fur animal epidemic necrotic pyoderma in Finland

Model Cases (n)/ Risk factors OR (95% CI) Goodness-of-fit statistics
Controls (n) Test Value P
Model 1 88/118 Farm type
 Mink farm vs fox farm 1.3 (0.5–3.1) McFadden’s R2 0.147  
 Mixed farm vs fox farm 3.8 (1.9–7.6) Cox-Snell R2 0.182  
Imported from Denmark 6.0 (1.6–22.8) Pearson 0.721 0.608
Imported from Poland 7.2 (1.4–37.3)    
Model 2 42/23 Access by birds 4.6 (1.2–16.8) McFadden’s R2 0.188  
Nipple 8.4 (2.0–35.0) Cox-Snell R2 0.217  
   Pearson 0.411 0.675
Model 3 42/34 Imports 5.3 (1.6–18.0) McFadden’s R2 0.241  
Access by wildlife 13.6 (1.5–121.0) Cox-Snell R2 0.282  
Size of the farm > 750 vs ≤ 750 mink 3.1 (1.0–9.0) Pearson 0.561 0.847
Model 4 65/90 Mink farm vs fox farm 4.5 (2.1–9.4) McFadden’s R2 0.179  
Access of wildlife 2.3 (1.0–5.4) Cox-Snell R2 0.216  
Nipple 3.3 (1.6–7.0) Pearson 0.658 0.621
  1. Model 1 all farms, Model 2 mixed farms Model 3 farms with mink Model 4 farms with foxes
  2. Number (n) of case farms and control farms in the model and odds ratios (OR) of the variables included in the model. In all of the goodness-of-fit tests, a test value of 1 indicates a particular well-fitting model; a Pearson’s value <0.05 indicates which model should be rejected. The variable “farm type” has three categories: mink, fox and mixed farms where fox farms serve as the reference group