Results of categorical models with best-fitting cutpoints
| HR (95% CI)*, N | |||
| Mean DWA exposure category (μg/m3) | Category mean (μg/m3) | All workers | Excluding asbestos-exposed and professionals |
| <0.6 | 0.185 | 1.0 (baseline), 15 | 1.0 (baseline), 9 |
| 0.6 to <2.0 | 1.29 | 2.29 (1.29 to 4.30), 53 | 1.30 (0.59 to 3.11), 20 |
| 2.0 to <8.0 | 3.68 | 2.84 (1.54 to 5.49), 42 | 2.41 (1.06 to 5.82), 19 |
| 8.0 to <12 | 9.97 | 5.68 (2.66 to 12.4), 19 | 7.22 (2.62 to 21.4), 14 |
| 12 to <50 | 23.8 | 4.88 (2.64 to 9.62), 116 | 6.68 (2.81 to 18.0), 91 |
| ≥50 | 356 | 4.13 (2.14 to 8.41), 48 | 4.80 (1.74 to 14.2), 14 |
| Power model β (p value) | 0.155 (<0.0001) | 0.231 (0.0001) | |
↵* Profile likelihood-based, matched on age and adjusted for birth cohort in categories <1900, 1900–1919, 1920–1929, ≥1930 and plant.