Objectives-Little information is available on the quantitative risks of respiratory disease from quartz in airborne dust in the heavy clay industry.
Available evidence suggested that these risks might be low, possibly because of the presence in the dust of other minerals, such as illite and kaolinite, which may reduce the harmful effects of quartz.
The aims of the present cross sectional study were to determine among workers in the industry (a) their current and cumulative exposures to respirable mixed dust and quartz ; (b) the frequencies of chest radiographic abnormalities and respiratory symptoms ; (c) the relations between cumulative exposure to respirable dust and quartz, and risks of radiographic abnormality and respiratory symptoms.
Methods-Factories were chosen where the type of process had changed as little as possible during recent decades. 18 were selected in England and Scotland, ranging in size from 35 to 582 employees, representing all the main types of raw material, end product, kilns, and processes in the manufacture of bricks, pipes, and tiles but excluding refractory products.
Weights of respirable dust and quartz in more than 1400 personal dust samples, and site histories, were used to derive occupational groups characterised by their levels of exposure to dust and quartz.
Full size chest radiographs, respiratory symptoms, smoking, and occupational history questionnaires were administered to current workers at each factory. (...)
Mots-clés Pascal : Exposition professionnelle, Médecine travail, Quartz, Poussière, Céramique lourde, Industrie, Homme, Toxicité, Appareil respiratoire pathologie, Facteur risque, Teneur air ambiant, Symptomatologie, Radiographie, Régression logistique, Analyse statistique, Epidémiologie, Royaume Uni, Europe
Mots-clés Pascal anglais : Occupational exposure, Occupational medicine, Quartz, Dust, Heavy clay ceramics, Industry, Human, Toxicity, Respiratory disease, Risk factor, Ambient air concentration, Symptomatology, Radiography, Logistic regression, Statistical analysis, Epidemiology, United Kingdom, Europe
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0110010
Code Inist : 002B03L03. Création : 16/11/1999.