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Table 3 Distribution of variables analysed in collected samples and results of univariable analyses

From: α-Tocopherol and β-carotene concentrations in feed, colostrum, cow and calf serum in Swedish dairy herds with high or low calf mortality

Model/variable High mortality (HM) Low mortality (LM) P valuea
25 pct. Median 75 pct. 25 pct. Median 75 pct.
Model feed (nHM = 27; nLM = 30)
 α-Tocopherol (mg/kg DM) 30.30 46.41 70.95 44.98 63.81 75.18 0.50
 β-Carotene (mg/kg DM) 15.3 28.3 35.1 20.6 36.6 42.2 0.33
 Number of days from collection of sample until arrival at lab 1 1 2 1 2 3 0.75
Model colostrum (nHM = 80b; nLM = 87b)
 α-Tocopherol (µg/mL colostrum) 1.58 2.62 5.68 0.91 2.25 4.37 0.085
 β-Carotene (µg/mL colostrum) 0.47 0.75 1.74 0.29 0.74 1.45 0.14
 Total solids (Brix%) 21.20 23.35 26.05 19.90 22.40 25.10 0.20
 Fatc (%) 3.44 4.95 7.30 2.65 3.82 6.56 0.10
 Lactosec (%) 2.82 3.10 3.31 3.01 3.21 3.50 0.003
 Proteinc (%) 12.39 13.65 15.48 11.07 13.02 14.77 0.21
 Number of days from collection of sample until arrival at lab 1 3 5 1 3 4 0.61
Model cow (nHM = 90; nLM = 99)
 α-Tocopherol (µg/mL serum) 1.75 2.34 2.75 1.98 2.59 3.00 0.17
 β-Carotene (µg/mL serum) 2.17 2.95 4.09 2.40 3.37 4.46 0.39
 Number of days from collection of sample until arrival at lab 1 1 2 1 2 3 0.74
Model calf (nHM = 89; nLM = 98)
 α-Tocopherol (µg/mL serum) 0.59 0.90 1.19 0.72 1.07 1.44 0.030
 β-Carotene (µg/mL serum) 0.07 0.11 0.17 0.08 0.15 0.20 0.18
 Total protein (g/L) 53 57 61 53 57 62 0.77
 Age (days) of the calf at sampling 3 4 6 3 4 5 0.32
 Number of days from collection of sample until arrival at lab 1 1 2 1 2 4 0.77
  1. aTested with univariable logistic regression with cluster on herd of its association with type of herd (HM/LM)
  2. bSamples with blood in colostrum omitted (nHM = 3; nLM = 8)
  3. cFive missing values