Table 5.
Results from the analysis of factors being significantly associated with barren ewes 1
| 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 |
Number of flocks (n), odds ratio (OR) and 95% confidence interval (CI) adjusted for flock size.
1Mated ewes not giving birth to lambs.