Progression of Pneumoconiosis in Coal Miners after Cessation of Dust Exposure: A Longitudinal Study Based on Periodic Chest X-ray Examinations in Hokkaido, Japan
| Autor: | Ichiro Sakai, Kenzo Okamoto, Kiyonobu Kimura, Hiroshi Kaji, Yoshinori Ohtsuka, Ikuo Nakano, Koichi Itabashi, Takeshi Igarashi |
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| Rok vydání: | 2010 |
| Předmět: |
Male
Pathology medicine.medical_specialty Pediatrics Longitudinal study Time Factors Japan Internal Medicine medicine Humans Dust exposure Longitudinal Studies Aged Retrospective Studies business.industry Pneumoconiosis Follow up studies Retrospective cohort study General Medicine Middle Aged medicine.disease Coal Mining Mass Chest X-Ray Natural history Disease Progression Progression rate business Complicated pneumoconiosis Follow-Up Studies |
| Zdroj: | Internal Medicine. 49:1949-1956 |
| ISSN: | 1349-7235 0918-2918 |
| DOI: | 10.2169/internalmedicine.49.2990 |
| Popis: | Background The progression rate of pneumoconiosis in retired coal miners over ten years has not been studied in Japan. Methods A retrospective longitudinal study was undertaken using chest X-rays of 1091 pneumoconiosis subjects in Hokkaido, Japan between 1985 and 2005. Results The final numbers of subjects were 207 (19% of the entry) after 1 decade and 85 (8%) after 2 decades. Sixty-two percent of 207 subjects after 1 decade and 29% of 85 showed progression in 2 decades. Thirty-one percent of ILO category 1 and 55% of category 2 subjects showed progression to complicated pneumoconiosis after 1 decade, and 6% (4 of 64) of category 1 and 6% (5 of 77) of category 2 subjects progressed to complicated pneumoconiosis during 2 decades. Conclusion The progression of pneumoconiosis was observed after the cessation of dust exposure, especially during the first 10 years. |
| Databáze: | OpenAIRE |
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