Baseline cross-shift changes | Follow-up changes | ||||
---|---|---|---|---|---|
Subjects, n | ΔFEV1 ml | ΔFEV1% | ΔFEV1 ml/year | ΔFVC ml/year | |
Male workers | |||||
Non-smokers | |||||
Woodworkers | 394 | −14.0 (231.1) | −0.20 (6.01) | −25.2 (41.3) | −23.1 (45.5) |
Control workers | 27 | −3.7 (175.4) | 0.19 (4.11) | −22.5 (38.6) | −29.0 (41.0) |
Smokers† | |||||
Woodworkers | 285 | 21.9 (220.3)*1 | 0.72 (6.32)*2 | −36.8 (43.9)*3 | −31.4 (50.4)*4 |
Control workers | 23 | 0.0 (151.5) | 0.45 (4.33) | −47.2 (55.7) | −45.4 (64.1) |
Female workers | |||||
Non-smokers | |||||
Woodworkers | 70 | −8.0 (199.4) | 0.10 (6.43) | −21.8 (37.0) | −15.8 (34.6) |
Control workers | 39 | −1.3 (164.4) | 0.24 (5.81) | −20.4 (27.1) | −17.4 (30.8) |
Smokers† | |||||
Woodworkers | 62 | −9.0 (158.9) | 0.09 (6.12) | −34.2 (39.6) | −28.3 (39.3) |
Control workers | 46 | 16.3 (142.6) | 0.59 (4.59) | −25.4 (38.7) | −22.6 (44.5) |
Data are presented as mean (SD).
*1p=0.042; *2p=0.054; *3p=0.001; *4p=0.025 (smokers versus non-smokers).
†Smokers are current smokers and ex-smokers who stopped smoking <2 years prior to baseline.
Δ, difference; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.