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Table 5 Cow- and herd-related factors associated with severe hock lesions (HL) in the final multivariable logistic regression model including 919 cows from 88 Swedish dairy herds

From: Hock lesions in dairy cows in freestall herds: a cross-sectional study of prevalence and risk factors

Variables and categories

β

SE

OR

CI

P-value

Intercept

− 0.96

0.37

  

0.011

Breed

Swedish Holstein (SH)

Ref

    

Swedish Red (SR)

− 0.52

0.19

0.60

0.41–0.87

0.008

SH × SR

− 0.16

0.31

0.78

0.46–1.55

0.596

Days in milk

0–90

Ref

    

91–180

0.46

0.23

1.59

1.01–2.51

0.047

181–305

0.91

0.23

2.47

1.57–3.91

< 0.001

> 305

0.11

0.31

1.12

0.60–2.07

0.723

Hygiene score a

1–2

Ref

    

3

− 0.17

0.21

0.84

0.56–1.26

0.404

4

− 0.86

0.32

0.42

0.23–0.79

0.007

Parity

First parity

Ref

    

Second parity

− 0.11

0.23

0.90

0.57–1.42

0.638

Third or higher parity

0.77

0.21

2.16

1.45–3.23

< 0.001

Cubicle width

     

Below recommendation

Ref

    

As recommended

− 1.03

0.19

0.36

0.24–0.52

< 0.001

Production system

Conventional

Ref

    

Organic

− 1.54

0.27

0.21

0.13–0.36

< 0.001

Teat disinfectant or other spray/dip applied after milking

Spray

Ref

    

Dip

− 0.75

0.30

0.47

0.26–0.85

0.012

None

− 1.15

0.52

0.32

0.12–0.87

0.026

Type of milking parlor

Herringbone

Ref

    

Tandem

− 0.76

0.20

0.47

0.31–0.69

< 0.001

  1. β regression coefficients, OR odds ratio, CI 95% confidence interval, Ref reference level
  2. aHygiene score 1–4: (1) completely clean, (2) manure stains on hind limb and/or udder (1 and 2 merged due to few observations in category 1), (3) one to two areas of manure patches of at least 10 cm in diameter, and (4) more than 2 areas of manure patches as described for score 3
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Acta Veterinaria Scandinavica

ISSN: 1751-0147