Studies of adults, children, and laboratory animals suggest an association between lead exposure and hearing loss.
A causal relationship might direct mandated medical surveillance of lead-exposed workers to include audiometric testing.
A cross-sectional, computerized dataset was obtained from a private occupational health screening company to examine the relationship between blood lead level and hearing loss.
Audiometry and blood lead results were available for 183 workers.
A statistically significant correlation was found between blood lead level and an elevated hearing threshold at 400 Hz (P=0.03) ; no other frequencies showed such a correlation.
This finding suggests either an interaction between nose exposure and lead, interaction of other exposure factors (such as cigarette smoking), or that factors other than biomechanical ones render the organ of CoTti more susceptible at 4000 Hz.
Further evaluation of these questions should be undertaken.
Computerized databases created for worker surveillance may be a source for data useful for examining other causal connections in occupational settings.
Mots-clés Pascal : Plomb, Métal lourd, Exposition professionnelle, Médecine travail, Homme, Toxicité, Etude transversale, Trouble audition, Surdité, Audiométrie, Oreille pathologie
Mots-clés Pascal anglais : Lead, Heavy metal, Occupational exposure, Occupational medicine, Human, Toxicity, Cross sectional study, Auditory disorder, Hearing loss, Audiometry, Ear disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0435207
Code Inist : 002B03L05. Création : 19/12/1997.