Table 3.
Multivariable binomial logistic regression analyses for the risk factors associated with dairy cattle herds testing seropositive for Coxiella burnetii in a bulk tank milk sample in Estonia.
| Variable | n/N 7 | Odds Ratio (95% CI 8) | p-Value | ANOVA p-Value |
|---|---|---|---|---|
| Keeping system (lactating cows) | ||||
| Tied | 5/36 | 1 | 0.087 | |
| Mixed 9 | 3/5 | 3.54 (0.28–45.64) | 0.332 | |
| Loose | 17/31 | 5.56 (1.17–26.39) | 0.031 | |
| No. of animals 10 | 1.001 (1.000–1.002) | 0.359 | ||
| Region | ||||
| Southwest | 8/25 | 1 | 0.002 | |
| Southeast | 3/13 | 0.50 (0.07–3.30) | 0.468 | |
| Northeast | 13/18 | 3.29 (0.71–15.17) | 0.127 | |
| Northwest | 1/16 | 0.09 (0.01–0.92) | 0.042 |
7 number of herds with at least one CB antibody positive result (n) and number of tested herds (N); 8 95% confidence intervals; 9 loose and tied keeping systems used; 10 number of animals in the herd.