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Table 5 Regression results, number of visitors in direct contact with animals

From: A survey of visitors on Swedish livestock farms with reference to the spread of animal diseases

Variable Coef. 95% confidence interval P
 category     
Negative binomial part of the model   
Constant 3.03 1.86 4.21 <0.001
Animal species     
 cattle baseline    
 swine −0.53 −0.92 −0.13 0.009
 sheep or goat −1.47 −2.31 −0.63 0.001
 mixed −0.46 −0.85 −0.07 0.021
Herd size     
 hobby baseline    
 medium −1.90 −3.13 −0.67 0.002
 large −1.57 −2.77 −0.37 0.010
Logistic part of model (probability of no visitors)  
Constant 1.73 1.11 2.35 <0.001
Animal species     
 cattle baseline    
 swine −0.94 −2.14 0.26 0.123
 sheep or goat 0.59 −0.81 1.98 0.409
 mixed 0.10 −0.65 0.85 0.789
Contact log period     
 summer baseline    
 autumn −0.88 −1.49 −0.27 0.005
 winter −0.21 −0.81 0.39 0.489
 spring 0.04 −0.50 0.57 0.891
Herd size     
 hobby baseline    
 medium −1.83 −2.49 −1.17 <0.001
 large −4.21 −8.06 −0.35 0.032
  1. Estimates from a negative binomial regression model used to analyse the number of visitors in direct contact with animals in Swedish livestock herds, based on a contact log sent out in 2006–2007.