Associations between cumulative occupational exposure, chronic obstructive bronchitis, emphysema, and COPD
| Cumulative exposure | Chronic obstructive bronchitis OR (95% CI)† | Emphysema OR (95% CI)† | COPD OR (95% CI)† |
|---|---|---|---|
| *p<0.05. | |||
| †All odds ratios (95% confidence intervals) adjusted for age and smoking status. | |||
| ‡N/A, insufficient subjects in stratum. | |||
| Women | |||
| Biological dust | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–12 years | 7.38 (1.39 to 39.2)* | 6.84 (1.18 to 39.7)* | 8.24 (2.01 to 33.8)* |
| >12 years | 4.65 (0.83 to 26.0) | 8.15 (1.56 to 42.5)* | 6.90 (1.75 to 27.2)* |
| Mineral dust | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–11 years | 4.23 (1.13 to 15.8)* | 1.36 (0.28 to 6.64) | 2.15 (0.65 to 7.07) |
| >11 years | 2.48 (0.29 to 21.6) | N/A‡ | 1.16 (0.14 to 9.44) |
| Gases and fumes | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–13 years | 5.60 (1.10 to 28.4) | 1.65 (0.42 to 6.51) | 2.80 (0.92 to 8.51) |
| >13 years | 3.91 (0.64 to 23.9) | 1.68 (0.38 to 7.44) | 1.85 (0.50 to 6.90) |
| Men | |||
| Biological dust | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–12 years | 2.65 (0.68 to 10.3) | 3.17 (1.06 to 9.49)* | 2.23 (0.85 to 5.82) |
| >12 years | 1.38 (0.26 to 7.30) | 0.88 (0.18 to 4.36) | 0.81 (0.22 to 2.97) |
| Mineral dust | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–11 years | 1.48 (0.41 to 5.26) | 1.11 (0.31 to 3.93) | 1.10 (0.39 to 3.11) |
| >11 years | N/A‡ | 1.18 (0.36 to 3.82) | 0.71 (0.24 to 2.10) |
| Gases and fumes | |||
| 0 years | 1.0 | 1.0 | 1.0 |
| 1–13 years | 1.93 (0.42 to 8.89) | 1.28 (0.39 to 4.22) | 1.39 (0.49 to 3.94) |
| >13 years | 1.39 (0.30 to 6.41) | 0.82 (0.24 to 2.83) | 1.03 (0.37 to 2.92) |