Adjusted ORs for chronic obstructive pulmonary disease from logistic regression models*
| Cases (n (%)) | Controls (n (%)) | ORs (95% CI) | PAR% | |
| Self-reported exposure | ||||
| Dusts | ||||
| Unexposed | 49 (45) | 76 (74) | 1 | |
| Low exposure-years | 27 (25) | 13 (13) | 4.6 (1.9 to 10.8) | 19.6 |
| High exposure-years | 34 (31) | 14 (14) | 5.9 (2.6 to 13.2) | 25.7 |
| Chemicals, gases and fumes | ||||
| Unexposed | 41 (37) | 72 (70) | 1 | |
| Low exposure-years | 32 (29) | 15 (15) | 2.9 (1.3 to 6.3) | 18.9 |
| High exposure-years | 37 (34) | 16 (15) | 3.6 (1.6 to 7.9) | 25.6 |
| Job exposure matrix exposure measures | ||||
| Biological dusts | ||||
| Unexposed | 39 (35) | 50 (49) | 1 | |
| Low cumulative exposure | 27 (25) | 25 (24) | 1.3 (0.6 to 2.9) | 5.5 |
| High cumulative exposure | 44 (40) | 27 (26) | 2.1 (1.1 to 4.2) | 13.6 |
| Mineral dusts | ||||
| Unexposed | 46 (42) | 51 (50) | 1 | |
| Low cumulative exposure | 27 (25) | 25 (24) | 1.3 (0.6 to 2.7) | 5.5 |
| High cumulative exposure | 37 (34) | 26 (25) | 1.1 (0.6 to 2.4) | 2.3 |
| Chemicals, gases and fumes | ||||
| Unexposed | 21 (19) | 36 (35) | 1 | |
| Low cumulative exposure | 44 (40) | 33 (32) | 2.2 (1.1 to 4.7) | 17.5 |
| High cumulative exposure | 45 (41) | 34 (33) | 1.8 (0.8 to 3.9) | 14.6 |
↵* Models adjusted for age, sex, current smoker, ex-smoker, history of tuberculosis