Table 2 Significant associations between independent and dependant variables (Model 1: Yes versus No)
Dependent variable | Odds ratio | Pvalue | Conf. interval (95%) |
|---|---|---|---|
Independent Variable | |||
Is the CA overcrowded? | |||
>99 cows vs. 66–99 cows | 5.0 | 0.001 | 1.9, 13.0 |
>99 cows vs. 31–65 cows | 7.8 | <0.001 | 2.6, 23.6 |
Do new born calves stay in CA for more than six hours? | |||
31-65 cows vs. >99 cows | 3.1 | 0.009 | 0.1, 0.8 |
Non-spring >99cows vs. spring 31–65 cows | 28.1 | 0.016 | 1.9, 421.4 |
Is the CA cleaned and bedded between every calving? | |||
31-65 cows vs. >99 cows | 3.6 | 0.001 | 0.1, 0.6 |
Are heifer calves fed pooled colostrum? | |||
66-99 cows vs. 31–65 cows | 2.2 | 0.039 | 1.0, 4.5 |
>99 cows vs. 31–65 cows | 4.8 | <0.001 | 2.3, 9.9 |
>99 cows vs. 66–99 cows | 2.2 | 0.024 | 1.1, 4.4 |
Is colostrum collected without teat disinfection? | |||
Mixed enterprise vs. Dairy only | 1.8 | 0.049 | 0.3, 0.9 |
Are heifer calves fed waste milk from sick cows? | |||
Mixed enterprise vs. Dairy only | 2.2 | 0.009 | 1.2, 3.9 |
Do calves have direct contact with cows/ manure pre entering milking herd? | |||
Non-dairy dense vs. Dairy dense | 2.5 | 0.034 | 0.2, 0.9 |
Do heifers have direct contact with cows/ manure pre entering milking herd? | |||
>99 cows vs. 66–99 cows | 2.5 | 0.019 | 1.2, 5.2 |
Do heifers have access to pasture spread with cow slurry? | |||
>99 cows vs. 66–99 cows | 7.5 | 0.028 | 0.1, 0.9 |