Table 1 Study population descriptive statistics of parity, calving date, milk production, BCS at calving and BCS loss post calving, EBI, breeding season characteristics and the number of locomotion scores recorded per cow during the study
Variable | N | Mean (SD) | Median | Min / Maxa |
|---|---|---|---|---|
Parity | 786 | 2.9 (1.4) | 2 | 1 / 10 |
1st Lactation | 250 | |||
≥2nd Lactation | 536 | |||
Calving date | 26/2/13 (26.7 days) | 20/2/13 | 1/1/13 / 21/5/13 | |
305 day ECM yield (Kg) | 6688.0 (1412.6) | 6704 | 3387 / 11720 | |
Fat and Protein produced (Kg) | 493.3 (104.1) | 491 | 250 / 883 | |
BCS at calving | 3.1 (0.2) | 3 | 3 / 4 | |
Maxa BCS loss post calving | 0.3 (0.2) | 0 | 0 / 1 | |
DIM to max loss (days) | 55.8 (34.2) | 45 | 10 / 246 | |
EBI overall (€) | 125.4 (43.6) | 130 | −77 / 249 | |
EBI fertility (€) | 62.8 (32.5) | 66 | −48 / 148 | |
ESD | 26/4/13 (14.7 days) | 24/4/13 | 25/3/13 / 2/7/13 | |
DIM at ESD (days) | 58.4 (16.7) | 56 | 29 / 115 | |
Breeding season length (weeks) | 13.4 (2.2) | 13 | 4 / 19 | |
Eligible for breeding (days) | 38.2 (32.9) | 27 | 1 / 130 | |
Locomotion scoring session 1 to ESD interval (days) | 33.9 (23.5) | 36 | −54 / 120 | |
No. of LS recorded | 3.8 (0.5) | 4 | 1 / 4 |