Analysis of Johne’s disease ELISA status and associated performance parameters in Irish dairy cows

BMC Veterinary Research

Table 4 Logistic regression- Significant associations between testing MAP ELISA positive and independent variables

Dependent Variable	Odds Ratio	P Value	Conf. Interval (95 %)	Model^a
Independent Variable
Johne’s disease ELISA positive
Herd size				Herd of origin Breed Herd size Parity EBI
Herd size >150 cows vs. herd size < 150 cows	2.4	<0.001	1.7, 3.4
Breeds
Red x vs. FRx	6.5	<0.001	4.8, 8.9
Other vs. FRx	5.5	<0.001	2.5, 12.2
Red x vs. Jex	12.2	<0.001	5.2, 28.6
Other vs. Jex	10.3	<0.001	3.3, 32.1

Larger sized herds were more likely to test positive compared to smaller sized herds. Friesians were less likely to test positive relative to other breeds examined
P Value: Significant P <0.05. Only significant results shown ^aOutlines the independent variables included in the logistic regression model

ISSN: 1746-6148