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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.