Table 2 Multivariable model of the risk of BoHV1 animal-level test positivity in relation to animal- and herd-level factors.

From: Bovine Herpes Virus Type 1 (BoHV-1) seroprevalence, risk factor and Bovine Viral Diarrhoea (BVD) co-infection analysis from Ireland

 

Obs. OR

Obs. P-value

Bootstrap

Bootstrap

Normal-based bootstrap

Bias corrected bootstrap

SE

P-value

Lower 95%CI

Upper 95%CI

Lower 95%CI

Upper 95%CI

Last herd size (quartiles)

 1

Ref.

       

 2

1.722

0.001

0.336

0.005

1.175

2.525

1.265

1.907

 3

2.239

 < 0.001

0.458

 < 0.001

1.500

3.343

1.794

2.280

 4

4.719

 < 0.001

1.029

 < 0.001

3.078

7.234

–

–

No. moves

 0

Ref.

       

 1

2.005

 < 0.001

0.383

 < 0.001

1.380

2.915

1.267

2.365

 2

2.632

 < 0.001

0.572

 < 0.001

1.718

4.030

1.642

3.164

 ≥ 3

3.494

 < 0.001

0.884

 < 0.001

2.128

5.736

2.143

4.463

Sex

 Female

Ref.

       

 Male

1.231

0.032

0.179

0.154

0.925

1.637

0.975

1.287

Year

 2018

Ref.

       

 2020

0.634

 < 0.001

0.099

0.003

0.467

0.861

0.518

0.939

BVDV status

 Neg.

Ref.

       

 Pos.

1.602

0.048

0.487

0.121

0.883

2.906

0.881

2.875

Constant

0.038

 < 0.001

0.011

 < 0.001

0.021

0.067

  

Herd level var.

1.754

 

0.098

 

1.572

1.958

  

ICC (rho)

0.483

 

0.028

 

0.429

0.538

  
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