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Using a representative sample of workers for constructing the SUMEX French general population based job-exposure
A Guéguen1, M Goldberg, S Bonenfant
1INSERM Unité 88-IFR 69, Hôpital National de Saint-Maurice, 14, rue du Val d'Osne, 94415 Saint-Maurice Cedex, France.
Background:
Job-exposure matrices (JEMs) applicable to the general population are usually constructed by using only the expertise of specialists.
Aims:
To construct a population based JEM for chemical agents from data based on a sample of French workers for surveillance purposes.
Methods:
The SUMEX job-exposure matrix was constructed from data collected via a cross-sectional survey of a sample of French workers representative of the main economic sectors through the SUMER-94 survey: 1205 occupational physicians questioned 48 156 workers, and inventoried exposure to 102 chemicals. The companies' economic activities and the workers' occupations were coded according to the official French nomenclatures. A segmentation method was used to construct job groups that were homogeneous for exposure prevalence to chemical agents. The matrix was constructed in two stages: consolidation of occupations according to exposure prevalence; and establishment of exposure indices based on individual data from all the subjects in the sample.
Results:
An agent specific matrix could be constructed for 80 of the chemicals. The quality of the classification obtained for each was variable: globally, the performance of the method was better for less specific and therefore more easy to assess agents, and for exposures specific to certain occupations.
Conclusions:
Software has been developed to enable the SUMEX matrix to be used by occupational physicians and other prevention professionals responsible for surveillance of the health of the workforce in France.