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Table 3 Final complete case model of associations between management practices and average herd longevity

From: Farm characteristics and management routines related to cow longevity: a survey among Swedish dairy farmers

Variable

Coefficient

SE

P > t

95% CI

Age of farmera (year)

7.15

1.65

0.000

3.89; 10.40

Herd sizea

− 0.03

0.22

0.887

− 0.47; 0.41

Housinga

 Tie stall

Reference

   

 Free stall

73.65

42.96

0.089

− 11.27; 158.56

Regiona,b

 South Sweden

Reference

   

 East Sweden

10.02

61.68

0.871

− 111.89; 131.93

 West Sweden

− 53.10

59.35

0.372

− 170.41; 64.21

 Middle Sweden

− 119.62

93.33

0.202

− 304.09; 64.85

 North Sweden

− 70.88

66.68

0.290

− 202.67; 60.90

 Initiate treatment on my own when recognizing unhealthy cows

− 16.14

5.80

0.006

− 27.61; − 4.68

Use of breeding advisory services

  No

Reference

   

  Yes

108.87

44.38

0.015

21.15; 196.59

Use of preventive herd

health advisory services

 No

Reference

   

 Yes

− 121.41

43.32

0.006

− 207.03; − 35.78

 Intercept

1317.05

103.75

  
  1. Final model of associations between management practices and average herd longevity (days) from the complete case analysis based on data from 156 herds
  2. aConfounders forced into the model
  3. bRegion: overall P-value = 0.38 (Wald test)