Table 6.

Univariate and multivariate analyses of the herd-level risk of having a non-negative RHT associated with cattle movements

	Confirmed positive RHT			Unconfirmed positive RHT			Unconfirmed inconclusive RHT
Purchased cattle from:	OR	95% CI	p-value	OR	95% CI	p-value	OR	95% CI	p-value
Univariate analysis
Overseas herd	4.32	1.54 – 12.2	0.005	1.01	0.47 – 2.12	0.989	1.23	0.92 – 1.64	0.167
High incidence parish of England and Wales	1.69	0.57 – 5.03	0.343	1.39	0.71 – 2.71	0.340	1.11	0.84 – 1.46	0.438
Low incidence parish of England and Wales	1.38	0.35 – 5.45	0.643	0.21	0.03 – 1.57	0.129	0.62	0.37 – 1.06	0.082
Scottish herd classified as:
confirmed positive RHT with high risk imports	0.54	0.11 – 2.74	0.460	0.99	0.36 – 2.71	0.983	0.72	0.45 – 1.12	0.147
confirmed positive RHT with no high risk imports	1.15	0.13 – 9.85	0.901	0.78	0.10 – 6.00	0.814	0.50	0.18 – 1.38	0.180
unconfirmed positive RHT with high risk imports	0.78	0.22 – 2.76	0.700	1.28	0.59 – 2.80	0.531	1.17	0.85 – 1.62	0.331
unconfirmed positive RHT with no high risk imports	0.85	0.21 – 3.45	0.820	0.29	0.66 – 1.24	0.094	0.92	0.62 – 1.37	0.683
unconfirmed inconclusive RHT with high risk imports	1.92	0.53 – 6.95	0.323	1.79	0.89 – 3.62	0.103	1.39	1.03 – 1.80	0.028
unconfirmed inconclusive RHT with no high risk imports	0.86	0.29 – 2.56	0.792	0.90	0.46 – 1.74	0.745	1.21	0.93 – 1.57	0.158
negative RHT and with high risk imports	1.70	0.42 – 6.78	0.456	1.61	0.60 – 4.38	0.347	0.83	0.50 – 1.38	0.482
negative RHT with no high risk imports	-	-	-	0.88	0.40 – 1.93	0.751	0.85	0.62 – 1.16	0.323
no VETNET database entries	-	-	-	-	-	-	1.12	0.64 – 1.98	0.702
Multivariate analysis
Overseas herd	4.13	1.47 – 11.6	0.002
Scottish herd classified as:
unconfirmed inconclusive RHT with high risk imports							1.35	1.03 – 1.78	0.037

The sample was restricted to data from 2006 to 2009. Both the univariate and multivariate analyses were performed using multinomial logistic regression models with the total number of cattle movements included as a confounding variable.