Early Incidence of Occupational Asthma Among Bakers, Pastry-makers and Hairdressers

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

866 participants

Study Classification

OBSERVATIONAL

Study Start Date

2008-12-31

Study Completion Date

2010-06-30

Brief Summary

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Background: Occupational exposures are thought to be responsible for 10-15% of new-onset asthma cases in adults, with disparities across sectors. Because most of the data are derived from registries and cross-sectional studies, little is known about incidence of occupational asthma (OA) during the first years after inception of exposure. This study focuses on this early asthma onset period among young workers in the bakery, pastry making and hairdressing sectors in order to assess early incidence of OA in these "at risk" occupations according to exposure duration, and to identify risk factors of OA.

Methods: This study is a longitudinal retrospective study with a nested case-control to identify risk factors of OA. The assessment of incidence evolution is made by exploring a series of promotions (or retrospective cohorts) with increasing duration since at work. The study population is composed of subjects who graduated between 2001 and 2006 in sectors where they experience exposure to organic or inorganic allergenic or irritant compounds (with an objective of 150 subjects by year) and 250 young workers with no specific occupational exposure.

This study is a descriptive, monocentric, longitudinal and retrospective study with cross-sectional measurements.

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Detailed Description

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Conditions

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Occupational Asthma

Study Design

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Observational Model Type

COHORT

Study Time Perspective

RETROSPECTIVE

Study Groups

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Young workers

Exposed young workers graduated in sectors at risk of occupational asthma (bakery, pastry-making or hairdressing)

"Non-exposed" young workers graduated in sectors without specific occupational exposure as the sale or the food sectors.

No interventions assigned to this group

Eligibility Criteria

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Inclusion Criteria

* for the exposed group: to be graduated between 2001 and 2006 from nine vocational schools in Lorraine, North-Eastern France
* for the "non-exposed" group: to be graduated in 2001 in the sale or the food sectors (butcher, pork butcher, caterer, cook job,…) from the same vocational schools