Table 5.
Factors associated with bacteriological positive milk samples.
| β | SE | OR | 95% CI for OR | P | ||
|---|---|---|---|---|---|---|
| WIM | 0.012 | 0.006 | 1.012 | 1.000, 1.024 | 0.07 | |
| MY | 0.023 | 0.013 | 1.024 | 0.998, 1.050 | 0.04 | |
| Parity | 1st parity1 | - | - | - | - | - |
| 2nd parity | 0.023 | 0.196 | 1.023 | 0.697, 1.501 | 0.91 | |
| > 2nd parity | 0.534 | 0.203 | 1.707 | 1.146, 2.540 | < 0.01 | |
| Intercept | - 1.435 | 0.355 | - | - | < 0.01 |
1 Categorical variable assigned as baselines
Associations between cows with milk samples positive for mastitis bacteria and explanatory variables; milk yield in the fourth week of lactation (MY), parity and weeks in milk (WIM) at s ampling date at the herd visit in conventional and organic farming (n = 845).