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Occupational Dust Exposure as a Risk Factor for Developing Lung Function Impairment
Johannes James Saers1, Ing-Liss Bryngelsson, Josefin Sundh
1From the School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden (J.S.); Department of Occupational and Environmental Medicine, Örebro University Hospital, Örebro, Sweden (I.-L.B.); Department of Respiratory Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden (J.S.); Department of Medical Sciences, Respiratory, Allergy & Sleep Research, Uppsala University, Uppsala, Sweden (C.J.); and Department of Occupational and Environmental Medicine, Faculty of Medicine and Health, Örebro University, Örebro, Sweden (L.A.).
Objective:
Dust exposure is high in several industries. We investigated associations of exposure in paper mills, wood pellet plants, and iron foundries with lung function impairment.
Methods:
Respirable silica, inhalable paper dust, or inhalable wood dust were collected as personal samples and spirometry was performed. Multiple linear regression analyzed associations with FEV 1 %pred and FVC%pred.
Results:
Wood pellet workers with high exposure to inhalable dust had lower FEV 1 %pred (95% CI) (-9.4 [-16 to -2.6]) and FVC%pred (-9.8 [-15 to -4.0]) compared with lowest exposure level. Workers at paper mills and foundries had no dose-dependent association but lower FEV 1 %pred and FVC%pred than in workers at wood pellets plants.
Conclusions:
Increased exposure to inhalable wood dust is associated with decreased lung function. Foundry and paper mill workers have generally lower lung function than wood pellet workers. Spirometry should be considered in workers in industries with airborne particulate matter pollution.
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