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Table 5 Results from the analysis of factors being significantly associated with barren ewes 1

From: Associations between housing and management factors and reproductive performance in 327 Norwegian sheep flocks

 

n

OR

95 CI of OR

P

Breed

    

  Norwegian White Sheep and other heavy breeds

236

1.00

-

 

  Spæl and other light breeds

35

1.14

0.94-1.38

0.199

  More than one

56

1.32

1.16-1.50

0.002

Regrouping during the indoor period

    

  Based on body condition

91

1.00

-

 

  Based on no. of foetuses (after scanning)

195

0.59

0.52-0.67

<0.001

  No particular grouping

41

1.31

1.10-1.55

0.002

  1. Number of flocks (n), odds ratio (OR) and 95% confidence interval (CI) adjusted for flock size.
  2. 1Mated ewes not giving birth to lambs.
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Acta Veterinaria Scandinavica

ISSN: 1751-0147