Table 5.

Multivariable logistic regression analysis of risk factors on herd level for an infection with C. burnetii detected using ELISA in 71 sheep flocks in Germany (2017/2018)

Variable	Category	Odds ratio (OR)	95% confidence interval (CI)	p value
Poultry	No	0.21	0.04–1.01	0.05
	Yes
Lambing behaviour	Spring	3.46	0.80–15.06	0.10
	Aseasonal
Purchases	No	13.61	2.86–64.64	0.001
	Yes

The final model had an Akaike Information Criterion (AIC) of 59.54 and a p value (likelihood ratio test) of 0.001.