Table 6.
Descriptive measures of selected health indicators from on-farm health information in the study collective of 154 pig units (farm-specific prevalence, corrected by age group)
| Indicator | unit | mean | median | SD | CV | min | max |
|---|---|---|---|---|---|---|---|
| bursa | % | 76.0 | 80.8 | 18.3 | 24.1 | 10.5 | 100.0 |
| bursitis | % | 2.4 | 1.9 | 2.2 | 90.6 | 0.0 | 13.2 |
| faecal skin dirtying | % | 12.4 | 5.6 | 15.7 | 126.7 | 0.0 | 89.0 |
| skin lesions | % | 2.8 | 1.6 | 3.6 | 126.5 | 0.0 | 21.5 |
| purulent nasal discharge | % | 1.3 | 0.9 | 1.6 | 124.8 | 0.0 | 10.0 |
| ophthalmic discharge | % | 8.9 | 5.9 | 9.9 | 110.6 | 0.0 | 59.3 |
| conjunctivitis | % | 4.9 | 1.1 | 8.6 | 176.7 | 0.0 | 45.0 |
| flank biting lesions | % | 0.7 | 0.0 | 1.3 | 176.2 | 0.0 | 8.1 |
| tail biting lesions* | % | 2.9 | 1.6 | 4.2 | 147.1 | 0.0 | 25.7 |
| ear haematoma* | % | 1.5 | 1.1 | 1.5 | 105.6 | 0.0 | 8.4 |
| ear biting lesions | % | 0.9 | 0.3 | 1.5 | 181.2 | 0.0 | 12.1 |
| lameness | % | 2.3 | 1.6 | 2.2 | 98.3 | 0.0 | 10.6 |
| coughing index*,** | bouts/min | 0.05 | 0.03 | 0.06 | 118.0 | 0.0 | 0.4 |
| diarrhoea | % | 8.3 | 0.0 | 16.3 | 195.7 | 0.0 | 87.5 |
* Observed prevalence (no correction factor because of nonsignificant t-test)
** Number of coughing bouts in 2 × 3 min, divided by number of animals per pen