Multivariate logistic regression analysis for interactions between different symptoms among the exposed in relation to controls; adjusted odds ratios (OR) with 95% confidence intervals (CI) are presented (controlling for age, gender, and smoking habits) for the significant symptoms
| Symptoms | OR (95% CI) |
|---|---|
| Toxic pneumonitis | 3.2 (1.8 to 5.6) |
| Unusual tiredness | 3.1 (2.0 to 5.0) |
| Breathlessness when walking with other persons of similar age | 2.4 (1.1 to 5.2) |
| Congested nose | 1.8 (1.1 to 2.7) |
| Soft stools related to work | 9.4 (4.9 to 18.2) |