Results of the multivariate analysis showing symptoms at work associated with the presence or absence of occupational asthma
| Symptoms at work | OR (95% CI) | p-value |
| All Subjects | ||
| Wheezing | 3.39 (1.43–8.0) | 0.005 |
| Loss of voice | 0.39 (0.18–0.86) | 0.02 |
| Nasal itching | 3.7 (1.8–7.8) | 0.0006 |
| Ocular itching | 2.37 (1.06–5.30) | 0.03 |
| Subjects exposed to high-molecular-weight agents | ||
| Wheezing | 6.79 (1.53–30.0) | 0.01 |
| Loss of voice | 0.14 (0.03–0.64) | 0.01 |
| Nasal itching | 6.23 (1.49–26.1) | 0.01 |
OR: odds ratio; CI: confidence interval.