Table 4 Univariate models for hay fever and asthma (ECRHS definition) in conventional farmers (n = 1205) and organic farmers (n = 593) (stratified analysis), and in all farmers (n = 1798).
| Hay fever, crude OR (95% CI) | Asthma, crude OR (95% CI) | |||||
|---|---|---|---|---|---|---|
| All farmers | Conventional farmers | Organic farmers | All farmers | Conventional farmers | Organic farmers | |
| Organic farming | ||||||
| No | 1 | 1 | — | — | ||
| Yes | 1.4 (1.0 to 2.0) | — | — | 0.7 (0.5 to 1.2) | — | — |
| Current farm type | ||||||
| Crops only | 1 | 1 | 1 | 1 | 1 | 1 |
| Livestock | 0.7 (0.5 to 1.0) | 0.7 (0.5 to 1.2) | 0.7 (0.4 to 1.2) | 1.5 (0.9 to 2.4) | 1.5 (0.8 to 2.6) | 1.5 (0.6 to 3.8) |
| Childhood farming environment | ||||||
| No | 1 | 1 | 1 | 1 | 1 | 1 |
| Crops | 0.4 (0.3 to 0.7) | 0.5 (0.2 to 0.9) | 0.3 (0.1 to 1.0) | 0.5 (0.2 to 1.1) | 0.6 (0.2 to 1.6) | 0.2 (0.0 to 1.8) |
| Livestock | 0.4 (0.3 to 0.6) | 0.3 (0.2 to 0.6) | 0.5 (0.3 to 0.9) | 0.9 (0.6 to 1.5) | 1.0 (0.5 to 2.0) | 0.6 (0.3 to 1.5) |
| Disinfectant use | ||||||
| None | 1 | 1 | 1 | 1 | 1 | 1 |
| QACs | 1.0 (0.6 to 1.8) | 1.2 (0.6 to 2.2) | 0.7 (0.2 to 2.9) | 1.9 (1.0 to 3.6) | 2.1 (1.0 to 4.4) | NE |
| Other disinfectants | 0.9 (0.6 to 1.3) | 0.8 (0.5 to 1.2) | 1.3 (0.8 to 2.4) | 1.6 (1.0 to 2.6) | 1.5 (0.8 to 2.7) | 1.7 (0.7 to 4.0) |
| Asthma in parents or siblings | ||||||
| No | 1 | 1 | 1 | 1 | 1 | 1 |
| Yes | 1.9 (1.3 to 2.9) | 1.6 (0.9 to 2.7) | 2.6 (1.4 to 4.8) | 3.8 (2.4 to 6.0) | 4.5 (2.7 to 7.6) | 2.4 (0.9 to 5.9) |
| Hay fever in parents or siblings | ||||||
| No | 1 | 1 | 1 | 1 | 1 | 1 |
| Yes | 4.7 (3.3 to 6.8) | 5.4 (3.4 to 8.5) | 3.7 (2.1 to 6.6) | 2.1 (1.3 to 3.3) | 1.8 (1.0 to 3.3) | 2.9 (1.2 to 6.7) |
NE, not estimable
– Not included (as it is not estimable in the subgroups)
QACs, quaternary ammonium compounds.