Table 3 Summary of environmental measures in compartments with finishing pigs after ten weeks of rearing in 46 study herds
From: Herd-level risk factors for chronic pleurisy in finishing pigs: a case-control study
Variable | n | Mean | SD | Median | Min | Max |
|---|---|---|---|---|---|---|
Temperature (°C) | ||||||
All herds | 46 | 19.4 | 2.8§ | 19.0 | 13 | 26.5 |
Control herds | 25 | 19.4 | 2.8 | 19.0 | 13 | 25.3 |
Case herds | 21 | 19.6 | 2.8 | 19.2 | 14.7 | 26.5 |
Humidity (%) | ||||||
All herds | 46 | 67.0 | 9.4 | 68.3 | 43.2 | 87.4 |
Control herds | 25 | 67.5 | 9.0 | 68.0 | 43.2 | 87.8 |
Case herds | 21 | 68.4 | 10.0 | 68.8 | 51.7 | 86.8 |
Airflow (m/s) | ||||||
All herds | 46 | 0.2 | 0.1 | 0.2 | 0.1 | 0.4 |
Control herds | 25 | 0.2 | 0.1 | 0.2 | 0.1 | 0.3 |
Case herds | 21 | 0.2 | 0.1 | 0.2 | 0.1 | 0.4 |
Ammonia (ppm) | ||||||
All herds | 46 | 5.8 | 3.4 | 5.3 | 1.3 | 18.3 |
Control herds | 25 | 5.1 | 2.5 | 5.3 | 1.3 | 9.0 |
Case herds | 21 | 6.6 | 4.2 | 5.5 | 1.3 | 18.3 |
Temperature of pen wall (°C) | ||||||
All herds | 43 | 18.9 | 3.3 | 18.9 | 10.9 | 25.1 |
Control herds | 24 | 19.1 | 2.9 | 19.0 | 15.5 | 24.7 |
Case herds | 19 | 18.5 | 3.8 | 18.9 | 10.9 | 25.1 |
Water flow (l/min) | ||||||
All herds | 46 | 1.8 | 0.8 | 1.6 | 0 | 4.1 |
Control herds | 25 | 1.7 | 0.8 | 1.6 | 0 | 4.1 |
Case herds | 21 | 1.9 | 0.8 | 1.6 | 0.95 | 3.5 |
Soiled pens (%) | ||||||
All herds | 46 | 21.8 | 22.4 | 16.7 | 0 | 100 |
Control herds | 25 | 18.0 | 18.1 | 10.3 | 0 | 64.3 |
Case herds | 21 | 26.4 | 26.4 | 16.7 | 0 | 100 |
Temperature outdoors (°C) | ||||||
All herds | 44 | 4.5 | 8.9 | 5.0 | −15 | 25.2 |
Control herds | 24 | 5.2 | 9.9 | 6.9 | −15 | 23.2 |
Case herds | 20 | 3.6 | 7.8 | 2.5 | −10 | 25.2 |