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. 1967 Nov;22(6):525–532. doi: 10.1136/thx.22.6.525

Rheumatoid pneumoconiosis

A study in colliery populations in the East Midlands coalfield

David C Lindars 1,1, Dewi Davies 1
PMCID: PMC471704  PMID: 6076507

Abstract

The routine chest radiographs of more than 21,000 miners from 23 unselected collieries in the East Midlands have been used for a study of rheumatoid pneumoconiosis and progressive massive fibrosis (P.M.F.). A broadened radiological concept of rheumatoid pneumoconiosis was used in diagnosis. The prevalence of simple pneumoconiosis categories 1, 2, and 3 was 5·5%, and of P.M.F. 0·59%. There were 55 cases accepted as rheumatoid pneumoconiosis, a prevalence of 0·26%. Thirty-two of these had positive latex fixation or Rose-Waaler tests for rheumatoid factor. The prevalence of P.M.F. was found to increase with increasing simple pneumoconiosis prevalence. A slight correlation between rheumatoid pneumoconiosis and simple pneumoconiosis prevalence was also found, but the bulk of the increase in P.M.F. was due to non-rheumatoid cases. The latter was closely paralleled in incidence by that of category 3 simple pneumoconiosis. Grouped results showed that rheumatoid pneumoconiosis occurred in between 2·3% and 6·2% of all men affected by pneumoconiosis. When examined on a geographical basis all areas exhibited a similar prevalence of rheumatoid cases, with the exception of Mansfield, where there was a significant excess. This excess was not significant when serologically positive cases only were considered. The findings are discussed in the light of the auto-immune theory for the development of massive lesions in the lungs of coal miners.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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