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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

From: The effect of Lameness before and during the breeding season on fertility in 10 pasture-based Irish dairy herds

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
  1. aMin = minimum; Max = maximum
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Irish Veterinary Journal

ISSN: 2046-0481