Table 2 Final mixed effects logistical regression model of BVDV seroprevalence

BVD birth herd status in year of birth (Referent: Negative)

 BVD positive herd in year of birth

20.889

8.033

7.900

 < 0.001

9.831

44.385

BVD last herd status in year of birth (Referent: Negative)

 Herd of slaughter BVD virus positive

6.565

3.066

4.030

 < 0.001

2.629

16.395

Herd type (referent: dairy)

 Beef

1.504

0.567

1.080

0.280

0.718

3.149

 Other

0.798

0.352

-0.510

0.609

0.337

1.892

 Suckler

0.387

0.095

-3.860

 < 0.001

0.239

0.626

Sex (Referent: Female)

 Male

0.538

0.102

-3.270

0.001

0.370

0.780

 Log(last herd size)

1.376

0.128

3.440

0.001

1.148

1.651

 Sample year (linear predictor)

0.779

0.065

-2.980

0.003

0.661

0.918

 Constant

0.004

0.003

-7.700

 < 0.001

0.001

0.015

Random effects

 county

  Variance

0.217

0.137

0.063

0.750

 county > herd

  Variance

6.816

1.753

4.117

11.283