FEV1 (l), FVC (l), association with cumulative exposure indices
| Exposure | Men | Women | ||||
|---|---|---|---|---|---|---|
| Non-smokers | Current smokers | Ex-smokers | All | |||
| FEV1 (l): | ||||||
| Respirable fibres (f.ml−1.y) | 0.036 (0.8) | −0.118 (−3.1) | −0.011 (−0.2) | −0.074 (−2.6) | ||
| Non-respirable fibres(f.ml−1.y) | 0.123 (0.4) | −0.523 (−2.2) | −0.139 (−0.5) | −0.455 (−2.50) | ||
| Respirable dust (mg.m−3.y) | 0.022 (0.5) | −0.088 (−2.2) | −0.005 (−0.1) | −0.137 (−2.5) | ||
| Total dust (mg.m−3.y) | −0.001 (−0.1) | −0.027 (−2.0) | −0.001 (−0.1) | −0.043 (−2.9) | ||
| Time in production (y) | 0.024 (0.1) | −0.057 (−2.4) | −0.014 (−0.6) | −0.069 (−1.9) | ||
| FVC (l): | ||||||
| Respirable fibres (f.ml−1.y) | 0.039 (0.8) | −0.121 (−2.8) | 0.021 (0.4) | −0.057 (−1.6) | ||
| Non-respirable fibres(f.ml−1.y) | 0.177 (0.5) | −0.513 (−1.9) | −0.098 (−0.3) | −0.365 (−1.6) | ||
| Respirable dust (mg.m−3.y) | 0.021 (0.4) | −0.074 (−1.6) | −0.010 (−0.2) | −0.140 (−2.0) | ||
| Total dust (mg.m−3.y) | 0.001 (0.1) | −0.026 (−1.7) | 0.002 (0.1) | −0.036 (−2.0) | ||
| Time in production (y) | −0.002 (−0.1) | −0.052 (−1.9) | 0.002 (0.1) | −0.074 (−1.7) | ||
Each index fitted in a separate regression model also including the terms shown in table 9.
Table shows coefficients/5 units exposure (tvalue).
t⩾2.0 indicates significance at the 5% level.