Figure 1.

Adjusted longitudinal change (ml/year) for FVC (A) and FEV₁ (B) by cumulative fibre exposure (f-mo/cc) for current male employees without asthma. Also shown is the number of tests (n) contributing to each age and exposure category (see text for model). (A) FVC: Initial weight (−4.2 ml/kg) and per cent weight change (−9.4 ml/%) significant at p<0.001. (B) FEV₁: Cumulative pack-years (−6.9 ml/pk-yr), current smoking (−42.1 ml), initial weight (−3.1 ml/kg) and per cent weight change (−9.1 ml/%) are significant at p<0.01.