Assessment & former worker. Author’s Consultation conclusion: SMR were all (2008) RMA statistically significant for ID:067997 asbestosis in all areas of analysis. A mortality for the Libby community revealed significantly elevated SMR for asbestosis (40 to 80 times higher than expected) and lung cancer (20% to 30% higher than expected) Liddell et al RMA ID: The 1891-1920 9780 workers (100% Chrysotile Level of exposure: Duration of Mortality study reporting (1997) 026465 Birth Cohort of men) mine/mill and Exposure 300 employment: >1 asbestos exposure Quebec asbestos factory million particles month (0.1 years) producing Chrysotile per cubic foot pneumoconiosis. 8009=deaths Miners and (mppcf) Pneumoconiosis death 108= pneumoconiosis Millers: rates per British deaths Development 100 000 subject-years Occupational from 1904 and clearly associated with Hygiene Society Mortality to exposure at the asbestos (1968) suggested 1992 mine/mill (23=deaths) and an asbestos air Thetford mine-company 3 concentration of 1 (53=deaths). Men whose mppcf = 3 fibre/ml exposures were (detected by <300mpcf.y accounted for phase contrast 30 pneumoconiosis microscopy). deaths. Exposure <300 Therefor the mpcf.y has been concentration of essentially mild, although exposure there was a small risk of approximately 300 pneumoconiosis mortality. Author’s
Assessment & Consultation (2008) RMA ID:067997 former worker. Author’s conclusion: SMR were all statistically significant for asbestosis in all areas of analysis. A mortality for the Libby community revealed significantly elevated SMR for asbestosis (40 to 80 times higher than expected) and lung cancer (20% to 30% higher than expected) Liddell et al (1997) RMA ID: 026465 The 1891-1920 Birth Cohort of Quebec Chrysotile Miners and Millers: Development from 1904 and Mortality to 1992 9780 workers (100% men) 8009=deaths 108= pneumoconiosis deaths Chrysotile mine/mill and asbestos factory Level of exposure: Exposure 300 million particles per cubic foot (mppcf) British Occupational Hygiene Society (1968) suggested an asbestos air concentration of 1 mppcf = 3 fibre/ml (detected by phase contrast microscopy). Therefor the concentration of exposure approximately 300 Duration of employment: >1 month (0.1 years) Mortality study reporting asbestos exposure producing pneumoconiosis. Pneumoconiosis death rates per 100 000 subject-years clearly associated with exposure at the asbestos mine/mill (23=deaths) and Thetford mine-company 3 (53=deaths). Men whose exposures were <300mpcf.y accounted for 30 pneumoconiosis deaths. Exposure <300 mpcf.y has been essentially mild, although there was a small risk of pneumoconiosis mortality. Author’s
asb_reasons10.12.2015.docx