Results of adjusted models of relationship between mean lung function parameters and exposure variables*
| Health outcome | Exposure variables | Mean (95% CI) |
|---|---|---|
| Spirometry (n=357) | ||
| FEV1% predicted | Time in production areas | |
| <1 h | 100.4 (98.4 to 102.3) | |
| ≥1 h | 96.4 (94.2 to 98.7) | |
| Tenure | ||
| <7 years | 100.6 (98.6 to 102.7) | |
| ≥7 years | 96.2 (94.1 to 98.3) | |
| FVC % predicted | Time in production areas | |
| <1 h | 102.8 (101.0 to 104.6) | |
| ≥1 h | 99.0 (96.9 to 101.1) | |
| Tenure | ||
| <7 years | 102.3 (100.4 to 104.2) | |
| ≥7 years | 99.5 (97.6 to 101.4) | |
| Diffusing capacity (n=325) | ||
| Diffusing capacity % predicted | Time in production areas | |
| <1 h | 94.0 (91.8 to 96.2) | |
| ≥1 h | 95.4 (92.9 to 97.9) | |
| Tenure | ||
| <7 years | 97.0 (94.7 to 99.2) | |
| ≥7 years | 92.5 (90.1 to 94.8) | |
| Total lung capacity % predicted | Time in production areas | |
| <1 h | 92.6 (91.2 to 94.1) | |
| ≥1 h | 91.9 (90.2 to 93.5) | |
| Tenure | ||
| <7 years | 93.8 (92.3 to 95.3) | |
| ≥7 years | 90.7 (89.1 to 92.3) | |
Statistically significant differences are shown in bold.
*Each health outcome model includes the exposure variable(s) associated with the lung function parameter in univariable analyses. Time spent in production areas was not associated with diffusing capacity parameters in univariable models, but is included in the final adjusted models for comparison with the spirometry models. Means are least squares means adjusted for the other exposure variable and smoking status.
FEV1, forced exploratory volume in 1s; FVC, forced vital capacity.