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Table 7 Univariate case-case comparisons of demographic risk factors between confirmed positive RHT herds, unconfirmed positive RHT herds, and unconfirmed inconclusive RHT herds

From: Risk factors for bovine tuberculosis in low incidence regions related to the movements of cattle

 

Confirmed positive RHT to Unconfirmed positive RHT

Confirmed positive RHT to Unconfirmed inconclusive RHT

Unconfirmed positive RHT to Unconfirmed inconclusive RHT

Variable

OR

95% CI  

p-value

OR

95% CI  

p-value

OR

95% CI  

p-value

log10 (Number of cattle tested)

1.52

0.76 – 3.13

0.247

2.24

1.19 – 4.31

0.014

1.36

0.88 – 2.12

0.170

log10 (Number of cattle present)

1.70

0.82 – 3.73

0.170

2.48

1.34 – 4.76

0.005

1.46

0.96 – 2.27

0.082

% of herd imported from high incidence regions

1.09

1.01 – 1.19

0.040

1.04

0.99 – 1.06

0.067

0.98

0.93 – 1.02

0.482

log10 (Number of cattle moved onto farm)

1.04

0.66 – 1.63

0.874

1.26

0.86 – 1.83

0.226

1.22

0.93 – 1.61

0.154

log10 (Number of farms within 5 km radius)

0.29

0.09 – 0.87

0.029

1.01

0.51 – 2.19

0.987

2.61

1.39 – 5.24

0.005

Neighbouring herd with:

         

     confirmed positive RHT

0.70

0.33 – 1.40

0.323

0.98

0.51 – 1.80

0.970

1.42

0.92 – 2.14

0.105

     unconfirmed positive RHT

1.11

0.56 – 2.16

0.764

1.34

0.75 – 2.34

0.309

1.21

0.79 – 1.83

0.371

     unconfirmed inconclusive RHT

0.98

0.25 – 0.96

0.955

1.15

0.63 – 2.27

0.660

1.18

0.75 – 1.91

0.488

Northing coordinate (100 km units)

0.70

0.51 – 0.95

0.025

0.73

0.57 – 0.93

0.014

0.99

0.84 – 1.17

0.924

Easting coordinate (100 km units)

0.61

0.37 – 0.97

0.041

0.71

0.49 – 1.02

0.064

1.08

0.82 – 1.43

0.579

Herd production type:

         

     Beef

Ref

-

-

Ref

-

-

Ref

-

-

     Beef fattening

-

-

-

-

-

-

-

-

-

     Beef suckler

1.15

0.56 – 2.37

0.703

1.36

0.73 – 2.53

0.331

1.18

0.76 – 1.82

0.457

     Dairy

1.32

0.57 – 3.03

0.501

1.96

0.96 – 3.93

0.059

1.48

0.86 – 2.47

0.142

     Mixed

-

-

-

-

-

-

-

-

-

log10 (Average number of sheep per year)

0.93

0.74 – 1.16

0.498

0.96

0.79 – 1.16

0.628

1.03

0.90 – 1.19

0.650

log10 (Average number of poultry per year)

0.90

0.32 – 2.24

0.827

0.72

0.31 – 1.34

0.369

0.78

0.45 – 1.21

0.316

  1. The analysis included all Scottish cattle herds that were subject to RHT from 2002 to 2009.
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BMC Veterinary Research

ISSN: 1746-6148

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