Risk of respiratory symptoms in 2013, all study subjects, and regressed on joint and separate effects of occupational dust exposure and daily smoking
| Exposure | All men# | Daily smokers¶ OR (95% CI) | Nonsmokers¶ OR (95% CI) |
| Mineral dust | |||
| Yes | 2.3 (1.6–3.2) | 7.2 (4.1–12.4) | 2.4 (1.6–3.8) |
| No | 1.0 | 3.5 (2.4–5.1) | 1.0 |
| Metal dust/fumes | |||
| Yes | 1.9 (1.3–2.7) | 7.0 (4.0–12.1) | 1.7 (1.0–2.7) |
| No | 1.0 | 3.3 (2.2–4.8) | 1.0 |
| Organic dust | |||
| Yes | 2.2 (1.6–3.1) | 7.4 (4.3–12.9) | 2.3 (1.5–3.4) |
| No | 1.0 | 3.5 (2.4–5.2) | 1.0 |
| Any dust | |||
| Yes | 2.1 (1.6–2.8) | 7.2 (4.6–11.3) | 1.9 (1.3–2.8) |
| No | 1.0 | 3.0 (1.9–4.8) | 1.0 |
#: adjusted for age and smoking; ¶: adjusted for age.