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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