Dust concentrations stratified by job-title-defined exposure category
| Subjects n | Dust mg·m-3 | |
| Non-/low/intermittent exposure | 92 | 0.38±2.80 (0.02–4.51) |
| Nonexposed | 20 | 0.15±2.44 (0.02–0.62) |
| Low/intermittent exposure | 72 | 0.49±2.48 (0.06–4.51) |
| High exposure to dry dust | 48 | 0.62±2.23 (0.08–3.11) |
| High exposure to green dust | 43 | 0.80±2.25 (0.24–6.24) |
Data are presented as geometric mean±sd (range). The ANOVA-explained variance including four exposure categories and mill number was 26% (p<0.0001), and including three exposure categories (combining nonexposed and low/intermittent exposure) and mill number was14% (p<0.0001).