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Update of an occupational asthma-specific job exposure matrix to assess exposure to 30 specific agents.

Journal article
Authors Nicole Le Moual
Jan-Paul Zock
Orianne Dumas
Theodore Lytras
Eva Andersson
Linnea Lillienberg
Vivi Schlünssen
Geza Benke
Hans Kromhout
Published in Occupational and environmental medicine
Volume 75
Issue 7
Pages 507-514
ISSN 1470-7926
Publication year 2018
Published at
Pages 507-514
Language en
Links dx.doi.org/10.1136/oemed-2017-10486...
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Occupational medicine, Epidemiology, Respiratory Medicine and Allergy

Abstract

We aimed to update an asthmagen job exposure matrix (JEM) developed in the late 1990s. Main reasons were: the number of suspected and recognised asthmagens has since tripled; understanding of the aetiological role of irritants in asthma and methodological insights in application of JEMs have emerged in the period.For each agent of the new occupational asthma-specific JEM (OAsJEM), a working group of three experts out of eight evaluated exposure for each International Standard Classification of Occupations, 1988 (ISCO-88) job code into three categories: 'high' (high probability of exposure and moderate-to-high intensity), 'medium' (low-to-moderate probability or low intensity) and 'unexposed'. Within a working group, experts evaluated exposures independently from each other. If expert assessments were inconsistent the final decision was taken by consensus. Specificity was favoured over sensitivity, that is, jobs were classified with high exposure only if the probability of exposure was high and the intensity moderate-to-high. In the final review, all experts checked assigned exposures and proposed/improved recommendations for expert re-evaluation after default application of the JEM.The OAsJEM covers exposures to 30 sensitisers/irritants, including 12 newly recognised, classified into seven broad groups. Initial agreement between the three experts was mostly fair to moderate (κ values 0.2-0.5). Out of 506 ISCO-88 codes, the majority was classified as unexposed (from 82.6% (organic solvents) to 99.8% (persulfates)) and a minority as 'high-exposed' (0.2% (persulfates) to 2.6% (organic solvents)).The OAsJEM developed to improve occupational exposure assessment may improve evaluations of associations with asthma in epidemiological studies and contribute to assessment of the burden of work-related asthma.

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