Occupational exposure | ≤ 1 exacerbations (%) | ≥ 2 exacerbations (%) | Total (%) |
---|---|---|---|
Biomass exposure | 23 (11.7) | 23 (11.7) | 46 (23.3) |
Mineral dust | 25 (12.7) | 63 (32.0) | 88 (44.7) |
Organic dust | 16 (8.1) | 27 (13.7) | 43 (21.8) |
No exposure | 5 (2.5) | 15 (7.6) | 20 (10.1) |