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Table 1 Descriptive statistics for four register-based indicators for discriminating between lameness prevalences ≥ 16% (High, n = 10) and < 16% (Low, n = 30) in 40 Danish dairy herds

From: Evaluation of the performance of register data as indicators for dairy herds with high lameness prevalence

  Mean P-value* Median SD Q1 Q3 Max
Indicator Low High   Low/High Low/High Low/High Low/High Low/High
Cow mortalitya 4.6 7.3 0.04 3.6/5.0 2.9/3.9 0.0/4.9 7.3/9.7 10.2/16.1
Bulk milk SCCb 204 241 0.05 196/226 49/48 163/213 235/276 327/318
Lean cowsc 24.1 25.5 0.8 24.4/23.9 14.7/15.6 11.9/13.3 33.3/41.3 59.5/43.6
SD age at first calvingd 2.5 2.6 0.6 2.3/2.3 0.7/0.8 2.2/2.2 2.9/2.3 3.9/4.6
  1. *P-values derived from the univariable screening for the differences in means between the two groups of lameness prevalence (high ≥ 16%, low < 16%)
  2. aAnnual mean cow mortality rate
  3. bBulkmilk somatic cell count × 1000 cells/mL
  4. cProportion of lean cows at slaughter out of total number slaughtered per herd (%)
  5. dStandard deviation (SD) of age at first calving in months