aOR 95% CI P-value
Breed 0.5 0.3 – 0.7 0.001*
Age 0.5 0.3 – 0.7 < 0.001*
BCS 2.3 1.5 – 3.7 < 0.001*
Herd size 0.6 0.4 – 0.9 0.004*