Ann. occup. Hyg., Vol. 45, No. 7, pp. 603-608, 2001
© 2001 British Occupational Hygiene Society
Published by Oxford University Press
Variations in Exposure to Inhalable Wood Dust in the Danish Furniture Industry. Within-and Between-Worker and Factory Components Estimated from Passive Dust Sampling
,*
Department of Indoor Air, National Institute of Occupational Health Lersø Parkallé 105, DK-2100 Copenhagen Ø, Denmark
Department of Occupational and Environmental Medicine, Skive Hospital Resenvej 25, DK 7800 Skive, Denmark
Department of Epidemiology and Surveillance, National Institute of Occupational Health Lersø Parkallé 105, DK-2100 Copenhagen Ø, Denmark
*Author to whom correspondence should be addressed.
Variability of exposure to wood dust at large factories in the Danish furniture industry was studied. Three repeated exposure measurements of 292 workers at 38 factories were included in the study. The measurements were carried out by use of personal passive dust monitors. The components of variance were estimated by means of a random effects ANOVA model. The ratio of within- to between-worker variance was 1.07. Based on this result, and three repeated exposure measurements, the observed relation between health outcome and exposure will be attenuated to 74% of the true value. Grouping by factory showed very poor exposure contrast, as the contrast in exposure level among factories was as low as 0.15.
wood dust • furniture industry • variance components • passive dust sampling
Received November 7, 2000; in final form February 8, 2001
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