Risks of silicosis in coalworkers exposed to unusual concentrations of respirable quartz.
Objectives-To describe the radiographic changes in coalworkers exposed to unusual concentrations of respirable quartz during the 1970s, and to relate these to exposure measurements.
Methods-Men who had worked at one Scottish colliery during the 1970s were invited to a health survey.
Chest radiographs were taken from 547 subjects
Classifications of these films under the International Labour Organisation (ILO) 1980 scheme were related, by logistic regression, to existing data on individual men's exposures to respirable dust and quartz.
-Taking the median of the three readers'results on profusion of small opacities, 203 men (38%) showed progression of at least one profusion category on the 12 point scale, from the various 1970s surveys to the follow up in 1990-1.
A total of 158 men (29%) had a profusion of at least 110, and 47 (8.6%) of at least 211 at the follow up survey.
Large opacities were recorded as present by at least two readers for 14 (2.6%) of the men.
Profusion of small opacities was strongly related to exposures experienced in the 1970s, and more strongly for quartz than for the non-quartz fraction of the dust.
Estimates of risk are presented over the range of quartz exposures experienced.
Conclusions-The quartz exposures experienced by some men at this colliery have caused considerable progression of radiographic abnormalities since exposure ended. (...)
Mots-clés Pascal : Quartz, Inhalation, Industrie extractive, Charbon, Antécédent, Silicose, Silice, Médecine travail, Toxicité, Homme, Exposition professionnelle, Epidémiologie, Royaume Uni, Europe, Relation dose réponse, Appareil respiratoire pathologie, Poumon pathologie, Pneumoconiose, Maladie professionnelle, Radiographie, Histoire professionnelle
Mots-clés Pascal anglais : Quartz, Inhalation, Mining industry, Coal, Antecedent, Silicosis, Silica, Occupational medicine, Toxicity, Human, Occupational exposure, Epidemiology, United Kingdom, Europe, Dose activity relation, Respiratory disease, Lung disease, Pneumoconiosis, Occupational disease, Radiography
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0102178
Code Inist : 002B03L03. Création : 22/06/1998.