Risk factors for bovine tuberculosis in low incidence regions related to the movements of cattle

BMC Veterinary Research

Table 10 Multivariate case–control comparison of demographic risk factors between confirmed positive RHT herds, unconfirmed positive RHT herds, unconfirmed inconclusive RHT herds, and negative RHT herds

	Confirmed positive RHT			Unconfirmed positive RHT			Unconfirmed inconclusive RHT
Variable	OR	95% CI	p-value	OR	95% CI	p-value	OR	95% CI	p-value
log₁₀ (Number of cattle tested)	8.56	4.59 – 16.0	<0.001	5.78	3.77 – 8.87	<0.001	4.72	3.98 – 5.58	<0.001
% of herd imported from high incidence regions	1.05	1.02 – 1.08	<0.001				1.03	1.01 – 1.04	<0.001
log₁₀ (Number of farms within 5 km radius)	0.24	0.11 – 0.56	<0.001				0.38	0.30 – 0.48	<0.001
Neighbouring herd with:
unconfirmed positive RHT	1.79	0.99 – 3.20	0.050				1.37	1.15 – 1.64	<0.001
unconfirmed inconclusive RHT	2.12	1.03 – 4.31	0.040	1.65	1.03 – 2.63	0.037	1.90	1.57 – 2.31	<0.001
Herd production type:
Beef							Ref	-	-
Dairy							0.70	0.55 – 0.88	0.003

The analysis included all Scottish cattle herds that were subject to RHT from 2002 to 2009 and used a multinomial logistic regression model with herd bTB risk classification as the dependent variable.

ISSN: 1746-6148