NEG herds | POS herds | |||
---|---|---|---|---|
Variable | Median | IQR | Median | IQR |
Herd size, cow-years | 57 | 40-75 | 43 | 32-62 |
Milk yield, kg/cow-year | 9013 | 8640-9982 | 8964 | 88315-8759 |
BTMSCC1, 1000 cells/ml | 163 | 140-187 | 218 | 164-283 |
Calving interval, days | 390 | 381-413 | 402 | 387-415 |
Calving to first AI2, days | 84 | 76-98 | 91 | 80-104 |
Number of AI2 | 1.7 | 1.5-2.3 | 1.8 | 1.6-2 |
Dead calves3 0-24 h | 0.040 | 0.033-0.052 | 0.047 | 0.028-0.093 |
Culling3 | 0.26 | 0.23-0.39 | 0.36 | 0.26-0.42 |
UDS3,4 ≥ 6 | 1.3 | 0.97-1.4 | 1.7 | 1.2-2.3 |