Table 1.
Multivariable logistic regression model for risk factors jointly associated with bulk tank milk antibody positivity to Coxiella burnetii in 100 randomly selected Danish dairy cattle herds collected in February 2008
|
Variables |
Respondents |
Odd Ratio (95% CI) |
P-value* |
|
|---|---|---|---|---|
| Total | No. (%) positive | |||
| Sharing equipment (machines) with other herds |
0.04 |
|||
|
Yes |
23 |
17 (73.91) |
3.62 (1.03 - 12.76) |
|
|
No |
77 |
42 (54.55) |
1 |
|
| Animals’ contact with human visitors |
0.01 |
|||
|
Yes |
70 |
47 (79.66) |
4.17 (1.41 - 12.5) |
|
|
No |
30 |
12 (20.34) |
1 |
|
| Insemination by other than artificial insemination (AI) technician |
0.01 |
|||
|
Yes |
13 |
12 (92.31) |
7.69 (2.08 - 16.95) |
|
|
No |
87 |
47 (54.02) |
1 |
|
| Routine herd health contract with veterinarian |
0.01 |
|||
|
Yes |
56 |
40 (71.43) |
4.32 (1.51 - 12.36) |
|
|
No |
44 |
19 (43.18) |
1 |
|
| Hygienic precautions by veterinarian before entering the herd |
0.004 |
|||
|
No |
61 |
40 (65.57) |
5.00 (1.66 - 15.12) |
|
| Yes | 39 | 19 (48.72) | 1 | |
*P-value for the significant addition of the variable given the other variables in the model.