Univariate associations between farm characteristics and lung function results for poultry farmers (mean (SD))
| n |
FVC % Ref value |
FEV1
% Ref value |
MMEF25/75
% Ref value | |||
| Automatic feeding | No | 1 | Number of farmers without automatic feeding in the poultry house was too low | |||
| Yes | 35 | |||||
| Storage time liquid manure >1 months | No | 16 | 96.9 (13.4) | 96.9 (13.7) | 88.9 (20.7) | |
| Yes | 20 | 105.0 (15.4) | 102.8 (14.3) | 88.7 (20.7) | ||
| Air inlet: porous inlet | No | 15 | 108.5 (15.8)3-150 | 105.3 (13.1) | 87.5 (15.2) | |
| Yes | 21 | 96.4 (12.2) | 96.6 (14.1) | 89.7 (23.9) | ||
| Control: humidity sensor | No | 34 | Number of farmers with humidity sensor in the poultry house was too low | |||
| Yes | 2 | |||||
| Heating | No | 22 | 100.3 (11.7) | 99.3 (12.9) | 87.8 (18.5) | |
| Yes | 13 | 103.9 (19.8) | 102.6 (16.6) | 91.1 (24.3) | ||
| Total dust ⩾median (7.0 mg/m3) | No | 16 | 99.6 (14.3) | 98.2 (12.9) | 87.8 (20.0) | |
| Yes | 16 | 105.8 (15.9) | 103.2 (15.9) | 86.6 (17.5) | ||
| Endotoxin content in total dust ⩾median (257.6 ng/m3) | No | 16 | 101.9 (15.5) | 100.4 (13.9) | 87.5 (16.3) | |
| Yes | 17 | 102.7 (15.3) | 100.6 (15.0) | 86.9 (20.2) | ||
| Total fungi ⩾median (2.03-150107/m3) | No | 18 | 101.6 (13.0) | 100.7 (13.8) | 88.1 (22.3) | |
| Yes | 18 | 101.3 (17.0) | 99.7 (15.0) | 89.5 (18.8) | ||
| Total bacteria ⩾median (4.73-150109/m3) | No | 18 | 101.5 (14.6) | 100.8 (15.2) | 90.3 (20.9) | |
| Yes | 18 | 101.3 (15.6) | 99.6 (13.5) | 87.2 (20.3) | ||
| Ammonia ⩾ median (12 ppm) | No | 17 | 103.8 (12.8) | 101.4 (12.8) | 89.6 (22.5) | |
| Yes | 19 | 99.3 (16.6) | 99.1 (15.6) | 88.0 (18.8) | ||
| CO2 ⩾median (2100 ppm) | No | 16 | 104.3 (11.0) | 101.3 (10.7) | 85.1 (17.4) | |
| Yes | 19 | 99.5 (17.8) | 99.9 (16.9) | 92.2 (22.8) | ||
| Temperature ⩾median (16.2°C) | No | 18 | 98.7 (11.5) | 97.9 (12.6) | 89.1 (19.3) | |
| Yes | 18 | 104.2 (17.6) | 102.5 (15.6) | 88.4 (21.9) | ||
| Air humidity ⩾median (71%) | No | 18 | 103.7 (11.5) | 100.8 (11.2) | 87.0 (19.4) | |
| Yes | 18 | 99.1 (17.6) | 99.6 (17.0) | 90.6 (21.8) | ||
| Air velocity ⩾median (0.01 m/s) | No | 1 | Number of farmers with air velocity <median in the poultry house was too low | |||
| Yes | 34 | |||||
↵3-150 p<0.05, U test .