Occupational Asthma Reference

Heederik D, Jacobs J, Samadi S, van Rooy F, Portengen L, Houba R., Exposure-response analyses for platinum salt-exposed workers and sensitization: A retrospective cohort study among newly exposed workers using routinely collected surveillance data., J Allergy Clin Immunol, 2015;:,http://dx.doi.org/10.1016/j.jaci.2015.07.030

Keywords: Platinum, ammonium hexachlor platinate, incidence, prick test, air measurements, dose response

Known Authors

Dick Heederik, Institute of Risk Assessment Sciences, Utrecht Dick Heederik

Frits van Rooy, Utrecht University Frits van Rooy

JH Jacobs, Utrecht JH Jacobs

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Abstract

BACKGROUND: Chloroplatinate salts are well-known respiratory sensitizing agents leading to work-related sensitization and allergies in the work environment. No quantitative exposure-response relation has been described for chloroplatinate salts.

OBJECTIVE: We sought to evaluate the quantitative exposure-response relation between occupational chloroplatinate exposure and sensitization.

METHODS: A retrospective cohort study was conducted using routinely collected health surveillance data and chloroplatinate exposure data. Workers who newly entered work between January 1, 2000, and December 31, 2010, were included, and the relation between measured chloroplatinate exposure and sensitization (as determined by skin prick test responses) was analyzed in more than 1000 refinery workers from 5 refineries for whom a total of more than 1700 personal exposure measurements were available.

RESULTS: A clear exposure-response relation was observed, most strongly for more recent platinum salt exposure. Average or cumulative exposure over the follow-up period was less strongly associated with sensitization risk. The exposure-response relation was modified by smoking and atopy.

CONCLUSIONS: Indications exist that recent exposure explains the risk of platinum salt sensitization most strongly. The precision of the estimate of the exposure-response relation derived from this data set appears superior to previous epidemiologic studies conducted on platinum salt sensitization and as a result, might have possible utility for the development of preventive strategies.

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