Risk of sensitisation to various allergens with respect to contacts with farm animals. Because of the small number of subjects sensitised to bovine dander adjusted ORs could not be calculated
| n | OR (95% CI) of sensitisation to any of the pollens | OR (95% CI) of sensitisation to dog or cat | Prevalence of sensitisation to bovine dander (%) | |
|---|---|---|---|---|
| *Adjusted for smoking history and childhood farming environment. | ||||
| †Thirty six subjects could not define the duration of work with animals. | ||||
| Visits in animal shed during the last 12 months | ||||
| No visits | 179 | 1 | 1 | 1.1 |
| Less than once a week | 99 | 1.3 (0.66–2.5) | 0.93 (0.46–1.9) | 1.0 |
| Once a week to once a day | 66 | 0.52 (0.20–1.4) | 1.5 (0.72–3.1) | 9.1 |
| More than once daily | 88 | 0.41 (0.15–1.1)* | 0.28 (0.09–0.86)* | 10.2 |
| Duration of work with farm animals† | ||||
| Not at all | 203 | 1 | 1 | 2.0 |
| <5 years | 42 | 0.71 (0.27–1.9) | 1.2 (0.51–3.0) | 2.4 |
| 5–15 years | 58 | 0.30 (0.10–0.90) | 0.48 (0.18–1.3) | 1.7 |
| >15 years | 94 | 0.21 (0.07–0.62)* | 0.67 (0.30–1.5)* | 11.7 |