Table 3. Reproductive performance and mortality rates in 90 case and 82 control flocks in the lambing season of 2011/2012 compared to the previous lambing season, as reported by participating flock owners.
| Variable | Group | N | Less | Comparable | More | P-value1 |
| Abortion | Case | 69 | 13.0% | 79.7% | 7.2% | 0.73 |
| Control | 69 | 11.6% | 84.1% | 4.3% | ||
| Barren ewes | Case | 76 | 15.8% | 50.0% | 34.2% | 0.84 |
| Control | 77 | 19.5% | 48.1% | 32.5% | ||
| Lambing rate | Case | 71 | 32.4% | 54.9% | 12.7% | 0.16 |
| Control | 72 | 20.8% | 56.9% | 22.2% | ||
| Mortality rate lambs | Case | 86 | 5.8% | 64.0% | 30.2% | 0.21 |
| Control | 81 | 7.4% | 74.1% | 18.5% | ||
| Mortality rate rams | Case | 83 | 3.6% | 91.6% | 4.8% | 0.94 |
| Control | 75 | 2.7% | 92.0% | 5.3% | ||
| Mortality rate ewes | Case | 89 | 9.0% | 71.9% | 19.1% | 0.75 |
| Control | 81 | 8.6% | 76.5% | 14.8% | ||
| Number of lambs per ewe | Case | 79 | 29.1% | 46.8% | 24.1% | 0.50 |
| Control | 80 | 21.3% | 53.8% | 25.0% | ||
| Repeat breeders | Case | 70 | 4.3% | 52.9% | 42.9% | <0.01 |
| Control | 69 | 15.9% | 63.8% | 20.3% |
1
p-value following Pearson’s chi-squared test.