Respiratory consequences of exposure to wood dust and formaldehyde of workers manufacturing oriented strand board.
A cross-sectional study was performed at a plant in which 99 workers were employed in the manufacture of oriented strand board.
This group was compared with 165 unexposed workers from the petroleum industry.
Both groups were assessed, using a questionnaire, spirometry, and skin prick tests to common environmental antigens.
Environmental studies showed a low dust level of 0.27 mg/m3, consisting of particles of a mass median aerodynamic equivalent diameter of 2.5 mum.
There were variable concentrations of formaldehyde, up to 0.27 ppm.
A significant difference between the oriented strand board workers and oil field workers was noted for the forced expiratory volume in 1 s/forced vital capacity ratio, without significant differences in either the forced expiratory volume in 1 s or the forced vital capacity.
Oriented strand board workers who were current smokers were three times as likely to have a forced expiratory volume in 1 s/forced vital capacity ratio of less than 75% of that found in the currently smoking oil field workers.
Significant reductions in forced expiratory volume in 1 s (p=044) and forced vital capacity (p=022) in oriented strand board workers were noted across the work shift.
It is concluded that there was objective and self-reported evidence of airway irritation in the oriented strand board workers.
That this occurred at low levels of dust and formaldehyde exposure may be related to small particles that penetrated deeply into the airways.
Mots-clés Pascal : Poussière, Bois, Formaldéhyde, Industrie bois, Homme, Toxicité, Exposition professionnelle, Médecine travail, Appareil respiratoire pathologie
Mots-clés Pascal anglais : Dust, Wood, Formaldehyde, Wood industry, Human, Toxicity, Occupational exposure, Occupational medicine, Respiratory disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 95-0143682
Code Inist : 002B03L03. Création : 09/06/1995.