Ann. occup. Hyg., Vol. 41, No. 3, pp. 287-296, 1997
© 1997 British Occupational Hygiene Society
Published by Oxford University Press
research-article |
GROUPING STRATEGIES FOR EXPOSURE TO INHALABLE DUST, WHEAT ALLERGENS AND 
-AMYLASE ALLERGENS IN BAKERIES
*Department of Epidemiology and Public Health, Wageningen Agricultural University Wageningen, The Netherlands
Department of Air Quality, Wageningen Agricultural University Wageningen, The Netherlands
*Author to whom correspondence should be addressed. E-mail address: Dick.Heederik{at}Medew.hegl.wau.nl Tel.: +31 317 482080, fax: +31 317 482782.
This paper describes repeated measurements of inhalable flour dust, wheat allergens and 
-amylase allergens in the bakery industry. A total of 571 full-shift personal dust samples was collected. Wheat allergens and -amylase allergens were measured in 449 and 507 samples, respectively, by the use of recently developed immunoassays. For all three measures of exposure, the main components of exposure variability were determined. Different grouping strategies for studying exposure-response relationships were compared. The specific job of a bakery worker was identified as the most important source of variability in inhalable flour dust concentrations. For exposure to wheat allergens, the job performed was also the most important source of variation, but type of bakery also explained some of the variability. For -amylase allergen exposure, information on type of bakery was more important then job information. For exposure to inhalable dust and wheat allergens, a classification by job title would lead to sufficient contrast in average exposure levels. By contrast, a grouping strategy based on a combination of job and type of bakery appeared to be essential to obtain a useful classification of exposure to -amylase allergens. © 1997 British Occupational Hygiene Society Published by Elsevier Science Ltd
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