Table 3.

Univariate analysis of of the herd-level prevalence of prevalence of C. burnetii in cattle

Risk factors	Prevalence % (n seropositive/total)	Univariate analysis OR (CI 95%)
Herd size
<30	45.16 (14/31)	ref
30–46	76.19 (16/21)	3.89 (1.14–13.27)*
47–92	80 (16/20)	4.86 (1.32–17.89)*
>92	85 (17/20)	6.88 (1.67–28.37)**
Animal species
Only cattle	68.49 (50/73)	ref
Cattle + sheep	68.42 (13/19)	0.99 (0.34–2.95)
Total herds (n)	92

OR, odds ratio; CI, confidence interval; ref, reference category.

*P < 0.05; **P < 0.01.