House-level risk factors associated with the colonization of broiler flocks with Campylobacterspp. in Iceland, 2001 – 2004

Table 3 Final logistic model^a for house-level factors associated with Campylobacter in broilers in Iceland (n = 675)

Variable	b	SE	p-value	95% CI (b)	OR	95% CI (OR)
Ventilation type
Horizontal	Ref.	-	-	-	1.00	-
Both	1.15	0.44	0.008	0.30, 2.01	3.17	1.34, 7.47
Vertical	1.00	0.43	0.019	0.17, 1.84	2.73	1.18, 6.30
Boots cleaned and disinfected before entry to house	0.77	0.23	0.001	0.33, 1.21	2.16	1.39, 3.36
Use of geothermal water for cleaning house	1.18	0.25	< 0.001	0.68, 1.68	3.26	1.98, 5.35
Intercept	-3.41	0.45	< 0.001	-4.30, -2.52	-	-

^aLog likelihood = -368.8, AIC = 749.7 Random farm effect: ρ = 2.5 × 10^-7, Likelihood ratio test of ρ = 0: p = 1.000

ISSN: 1746-6148