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Table 2 Univariable analysis of risks for BVDV seropositivity associated with different types of beef and dairy replacement breeding cattle movements

From: Not all cows are epidemiologically equal: quantifying the risks of bovine viral diarrhoea virus (BVDV) transmission through cattle movements

  Number of herds with movements Number of herds without movements    
Type of cattle movements Cases Controls Cases Controls OR 95% CI p-value
Beef herds        
Open heifers 40 83 26 84 1.56 0.88 – 2.81 0.134
Pregnant heifers 32 43 34 124 2.74 1.50 – 4.94 < 0.001
Open cows (dry) 16 26 50 141 1.73 0.85 – 1.74 0.123
Open cows (calf at foot) 37 55 29 112 2.60 1.45 – 4.69 0.001
Pregnant cows (dry) 28 32 38 135 3.11 1.67 – 5.81 < 0.001
Pregnant cows (calf at foot) 17 38 49 129 1.18 0.59 – 2.25 0.627
Dairy herds        
Open heifers 54 12 50 34 3.06 1.46 – 6.77 0.004
Pregnant heifers 43 14 61 32 1.61 0.78 – 3.45 0.206
Open cows (dry) 22 3 82 43 3.84 1.24 – 16.9 0.036
Open cows (lactating) 50 13 54 33 2.35 1.13 – 5.10 0.025
Pregnant cows (dry) 22 7 82 39 1.49 0.61 – 4.05 0.398
Pregnant cows (lactating) 26 7 78 39 1.86 0.77 – 4.98 0.187
  1. Records of all cattle movements into the 233 open Scottish beef herds and 150 open Scottish dairy herds during the two year period prior to the date of serological sampling were used to generate the binary categorical movement variables listed in the table below.