Outcome and BIC | Variable | Odds ratio | P | 95% CI |
---|
Lower | Upper |
---|
ROUGHNESS | DIM | 1.016 | 0.032 | 1.001 | 1.030 |
BIC = 290.59 | Parity 1 (reference) | – | – | – | – |
Parity 2 | 0.291 | 0.201 | 0.044 | 1.928 |
Parity ≥ 3 | 2.943 | 0.073 | 0.903 | 9.593 |
AVGFLOW, kg/min | 0.020 | 0.001 | 0.003 | 0.160 |
THICKNESS | DIM | 1.024 | 0.006 | 1.007 | 1.041 |
BIC = 281.38 | Parity 1 (reference) | – | – | – | – |
Parity 2 | 0.386 | 0.381 | 0.046 | 3.249 |
Parity ≥ 3 | 3.969 | 0.056 | 0.963 | 16.362 |
AVGFLOW, kg/min | 0.019 | 0.001 | 0.002 | 0.181 |
- The models were selected based on having the lowest Bayesian information criterion (BIC) among other models for the same outcome
- DIM, days in milk; AVGFLOW, quarter average milk flow rate
- ROUGHNESS, dichotomized outcome variable where smooth teat-end callosity rings form the comparison group and teat-ends with a roughened callosity ring is considered abnormal
- THICKNESS, dichotomized outcome variable where teat-ends having a thin or not visible teat-end callosity ring form the comparison group, and medium, thick or extreme are considered abnormal