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Table 6 Effect of the Feet and leg traits on the risk of lameness in Chinese holstein cows

From: Body conformation traits in early-lactation associated with clinical mastitis and lameness in lactating Chinese holstein cows

Trait

Level (points)

B

SE

Wald χ2

df

OR value

95% confidence interval

P value

Lower limit

Upper limit

FA

5 vs. 4

-1.87

1.61

1.36

1

0.15

0.01

3.58

0.244

6 vs. 4

-0.25

1.41

0.03

1

0.78

0.05

12.28

0.858

7 vs. 4

-0.61

1.53

0.16

1

0.54

0.03

10.99

0.691

HD

4 vs. 3

-1.23

2.09

0.35

1

0.29

0.01

17.55

0.557

5 vs. 3

-1.54

1.94

0.63

1

0.22

0.01

9.59

0.428

6 vs. 3

-1.60

1.79

0.79

1

0.20

0.01

6.80

0.373

BQ

7 vs. 6

1.12

0.69

2.65

1

3.08

0.80

11.89

0.103

8 vs. 6

1.54

1.70

0.82

1

4.67

0.17

129.94

0.364

SRL

2 vs. 1

-2.36

0.98

5.78

1

0.10

0.01

0.65

0.016

3 vs. 1

-2.04

0.99

4.31

1

0.13

0.02

0.89

0.038

4 vs. 1

-3.14

1.37

5.24

1

0.04

0.00

0.64

0.022

5 vs. 1

-2.51

1.73

2.11

1

0.08

0.00

2.40

0.146

RLRV

6 vs. 5

-1.34

1.31

1.04

1

0.26

0.02

3.43

0.308

7 vs. 5

-1.37

1.21

1.28

1

0.25

0.02

2.74

0.259

8 vs. 5

-2.16

1.30

2.76

1

0.12

0.01

1.47

0.097

  1. B: unstandardized regression weight; SE: standard error for B; Wald χ2: the test statistic for the individual predictor variable; df: degrees of freedom. The reference level of each individual conformational feature is determined by the minimum score within the group