Table 1 Results of univariable and multivariable general linear regression models

LOG TI Breeding

TI 200

227

<0.01

<0.01

0.148

<0.01

0.01

Internal biosecurity

227

0.22

0.36

0.073

External biosecurity

227

0.51

0.08

0.083

Years experience

221

−0.07

0.81

0.071

Pathogens vaccinated

227

2.35

0.14

0.079

# sows

227

0.01

0.33

0.074

# employees

221

0.43

0.78

0.066

Gender

214

0.60

0.071

 Male

137

3.14

0.60

 Female

77

Ref.

Ref.

Education

210

0.11

0.082

 Lower

84

−15.47

0.05

 Higher

84

−15.77

0.06

 University

42

Ref.

Ref.

Farrowing rhythm (cat)

219

0.76

0.060

 >5

18

−0.81

0.95

 5

20

2.76

0.82

 4

48

−1.34

0.89

 3

80

4.33

0.62

 2

21

14.94

0.20

 1

32

Ref.

Ref.

LOG TI 200

TI Breeding

227

<0.01

<0.01

0.332

<0.01

<0.01

Internal biosecurity

227

−0.01

0.11

0.325

External biosecurity

227

−0.02

0.01

0.353

−0.03

<0.01

Weaning age

216

−0.05

0.05

0.335

−0.05

0.06

Years experience

221

<0.01

0.28

0.324

Pathogens vaccinated

227

0.18

<0.01

0.355

0.14

<0.01

# sows

227

<0.01

0.01

0.346

# employees

221

0.05

0.32

0.315

Gender

214

0.51

0.313

 Male

137

0.11

0.51

 Female

77

Ref.

Ref.

Education

210

0.39

0.331

 Lower

84

0.07

0.77

 Higher

84

0.28

0.24

 University

42

Ref.

Ref.

Zinc oxide

205

0.29

0.310

 Yes

39

0.25

0.29

 No

166

Ref.

Ref.

Anti-inflammatory weaners

227

0.05

0.338

 Yes

71

0.37

0.05

 No

156

Ref.

Ref.

Anti-coccidial

214

0.10

0.313

 Yes

90

0.28

0.10

 No

124

Ref.

Ref.

Farrowing rhythm

219

<0.01

0.360

<0.01

 >5

18

−0.78

0.05

−0.88

0.02

 5

20

−1.15

<0.01

−1.10

<0.01

 4

48

−0.51

0.07

−0.44

0.11

 3

80

−0.38

0.12

−0.21

0.42

 2

21

0.10

0.75

−0.06

0.85

 1

32

Ref.

Ref.

Ref.

Ref.

Number of weaned piglets per sow per year (WSY)

Years experience

217

−0.02

0.27

0.354

External biosecurity

223

0.05

<0.01

0.362

Internal biosecurity

223

0.03

0.06

0.349

Weaning age

212

−0.17

<0.01

0.367

−0.19

<0.01

Pathogens vaccinated

223

0.18

0.06

0.349

Mortality until weaning

222

−0.18

<0.01

0.423

−0.21

<0.01

#sows

223

<0.01

<0.01

0.391

#employees

217

0.22

0.02

0.359

TI Breeding

223

0.01

<0.01

0.362

0.01

0.06

TI 200

223

<0.01

0.71

0.339

Anti-inflammatory sucklers

223

 Yes

122

0.43

0.39

0.340

 No

105

Ref.

Ref.

Anti-inflammatory weaners

223

 Yes

71

0.57

0.13

0.345

 No

156

Ref.

Ref.

Anti-inflammatory sows

215

 Yes

217

1.18

0.49

0.343

 No

2

Ref.

Ref.

Anti-coccidial

211

 Yes

90

0.08

0.82

0.337

 No

124

Ref.

Ref.

Zinc oxide

201

 Yes

39

0.86

0.06

0.363

 No

166

Ref.

Ref.

Country * Weaning age

0.02

Belgium * Weaning age

−0.20

0.18

France * Weaning age

0.21

0.04

Germany * Weaning age

0.15

0.18

Sweden * Weaning age

Ref.

Ref.