Relative risk of sensitisation to amylase in 241 bakery and flour mill workers according to atopic status and exposure categories (after Nieuwenhuijsen and colleagues20)
| Risk factor | No. of subjects | Prevalence ratio | (95% CI) |
|---|---|---|---|
| Twelve subjects became sensitised: five from the low, two from the medium, and five from the high exposure bands. | |||
| Atopy | |||
| Negative | 155 | 1.0 | |
| Positive | 86 | 2.9 | (0.8 to 9.7) |
| Exposure category | |||
| Low | 203 | 1.0 | |
| Medium | 21 | 3.9 | (0.8 to 20.2) |
| High | 17 | 9.9 | (2.8 to 34.6) |