Results from logistic regression analysis of profusion of small opacities 1/0+ and 0/1+
| 1/0+ opacities | 0/1+ opacities | ||||
|---|---|---|---|---|---|
| OR (95% CI) | OR (95% CI) | ||||
| Respirable fibres (f.ml−1.y) | 1.02 (0.76 to 1.37) | 1.18 (0.98 to 1.43) | |||
| Respirable dust (mg.m−3.y) | 1.20 (0.94 to 1.54) | ||||
| Non-smokers | 0.86 (0.62 to 1.20) | ||||
| Current smokers | 1.45 (0.99 to 2.12) | ||||
| Ex-smokers | 1.22 (0.89 to 1.67) | ||||
| Time in production (y) | 1.01 (0.85 to 1.20) | 1.14 (1.02 to 1.27) | |||
ORs (95% CIs) are for a mean difference of 5 units in exposure after adjustment for age, smoking, and cumulative amount smoked. Exposure variables were fitted in separate models. Where effects differ significantly between smoking groups, these are shown separately