Factor | ORadj of risk factor* | |||
---|---|---|---|---|
Asthma (n = 164) | Atopy (n = 264) | Asthma in atopic farmers† (n = 33) | Asthma in non-atopic farmers (n = 131) | |
Results of a model with farm production and single exposure models are shown. Associations with asthma are also shown for atopic (n = 264) and non-atopic (n = 1350) individuals separately. The ORs of potential confounders were similar to table 2 (not shown). | ||||
*Adjusted by logistic regression. | ||||
†Only significant potential confounders were included in this model. | ||||
Farm production | ||||
Crop | 1 | 1 | 1 | 1 |
Poultry | 1.2 (0.64 to 2.3) | 1.3 (0.72 to 2.2) | 1.2 (0.37 to 4.0) | 0.90 (0.43 to 1.9) |
Sheep/goats | 1.1 (0.52 to 2.5) | 1.0 (0.47 to 2.1) | 0.59 (0.23 to 1.5) | 1.6 (0.69 to 3.9) |
Cattle | 1.8 (1.1 to 2.8) | 1.2 (0.80 to 1.8) | 0.58 (0.27 to 1.3) | 1.5 (0.88 to 2.6) |
Swine | 1.6 (1.0 to 2.5) | 0.84 (0.54 to 1.3) | 0.54 (0.19 to 1.6) | 2.0 (1.2 to 3.3) |
Total dust (mg/m3) | ||||
0–1.8 | 1 | 1 | 1 | 1 |
1.9–2.6 | 0.88 (0.57 to 1.4) | 0.98 (0.70 to 1.4) | 0.84 (0.36 to 2.0) | 0.89 (0.53 to 1.5) |
2.7–8.0 | 1.2 (0.82 to 1.9) | 0.89 (0.63 to 1.3) | 0.38 (0.13 to 1.1) | 1.6 (1.0 to 2.6) |
Fungal spores (106/m3) | ||||
0–1.6 | 1 | 1 | 1 | 1 |
1.7–3.4 | 1.3 (0.82 to 1.9) | 0.98 (0.70 to 1.4) | 0.55 (0.23 to 1.3) | 1.6 (0.96 to 2.6) |
3.5–38 | 1.2 (0.77 to 1.8) | 0.99 (0.70 to 1.4) | 0.28 (0.10 to 0.78) | 1.7 (1.0 to 2.7) |
Bacteria (106/m3) | ||||
0–9.1 | 1 | 1 | 1 | 1 |
9.2–14 | 0.92 (0.60 to 1.4) | 0.91 (0.65 to 1.3) | 0.63 (0.26 to 1.5) | 1.0 (0.62 to 1.7) |
15–94 | 1.2 (0.78 to 1.8) | 0.74 (0.52 to 1.0) | 0.54 (0.20 to 1.4) | 1.5 (0.93 to 2.3) |
Endotoxins (103 EU/m3) | ||||
0–26 | 1 | 1 | 1 | 1 |
27–60 | 0.97 (0.62 to 1.5) | 1.1 (0.76 to 1.5) | 0.55 (0.23 to 1.3) | 1.1 (0.67 to 1.9) |
61–140 | 1.2 (0.78 to 1.8) | 0.82 (0.58 to 1.2) | 0.34 (0.12 to 0.95) | 1.6 (0.99 to 2.5) |
Ammonia (ppm) | ||||
0–4.2 | 1 | 1 | 1 | 1 |
4.3–10 | 1.2 (0.81 to 1.9) | 0.93 (0.67 to 1.3) | 0.87 (0.38 to 2.0) | 1.4 (0.84 to 2.2) |
11–23 | 1.3 (0.87 to 2.1) | 0.92 (0.65 to 1.3) | 0.31 (0.10 to 0.95) | 1.8 (1.1 to 3.0) |