International Journal of Epidemiology, Vol 22, S16-S21, Copyright © 1993 by International Epidemiological Association
P Guenel, J Nicolau, E Imbernon, G Warret and M Goldberg
Occupational exposure to 50 Hz electric and magnetic fields (EMF) was
measured among 184 workers in thermoelectric power production plants using
an individual portable dosimeter. A job exposure matrix (JEM) is elaborated
from these data to be used in an epidemiological study on the potential
carcinogenic effects of EMF. To reduce the range of exposure
misclassification in the study, groups of workers with high exposure
homogeneity must be identified. Classifying the workers by type of plant
yielded homogeneous exposure groups, especially for workers in non-nuclear
power plants. Workers in nuclear plants had higher mean exposure to
magnetic fields, but the homogeneity of exposure was smaller. The exposure
also differed between occupations, but the occupational title did not
produce a uniform increase of exposure homogeneity within subgroups. It is
concluded that the place of work is the most important determinant of
exposure to magnetic fields for workers in thermoelectric power plants to
be included in the JEM.
ARTICLES
Design of a job exposure matrix on electric and magnetic fields: selection of an efficient job classification for workers in thermoelectric power production plants
INSERM U.88, Paris, France.
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