title: Pleural calcification in northwest Greece.
abstract: Mass miniature radiography in 1969 detected a high prevalence of pleural calcification in three villages in northwest Greece. In 1980 a survey of a 15% sample of the population over the age of 10 was carried out with a 80% response rate. Full-size radiographs, ventilatory capacity measurements, and a detailed questionnaire on respiratory symptoms, type of work, and residence were used. Independent classification of the 408 films by two readers using the ILO/UC scheme showed very few small opacities but a very high prevalence of pleural calcification first evident in young adults and rising to 70% in the elderly. The overall prevalence was 34.7% in men and 21.5% in women. A comparison with the 1969 survey showed a progression rate of 5% per annum. In neither sex was there a significant relation of pleural calcification to smoking, ventilatory capacity, nor type of work, though those classified as field croppers had a slightly higher prevalence. There was no obvious evidence of increased lung cancer or mesothelioma in the villages. The agent responsible for this apparently benign condition was not identified.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002114:Calcinosis / Q000453:epidemiology*; D002648:Child; D005260:Female; D005541:Forced Expiratory Volume; D006115:Greece; D006801:Humans; D008297:Male; D008875:Middle Aged; D010995:Pleural Diseases / Q000453:epidemiology*; D012737:Sex Factors; D014797:Vital Capacity