Table 5.

Regression results, number of visitors in direct contact with animals

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

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.