The incidence and progression of pneumoconiosis over nine years in U.S. coal miners: I. principal findings.

Details

• Personal Author:
  Attfield, Michael ; Glenn R ; Reger, Robert
• Description:
  The incidence and progression of pneumoconiosis over 9 years in US coal miners was examined and compared to British findings. The study, which began in 1970, consisted of over 9000 miners followed up for 9 years the final cohort including 1470 subjects. The loss of miners was due mainly to retirement and mine closures. Examinations involved posterior/anterior and lateral X-rays. X-ray readings were obtained using the side by side method, thus giving readers an opportunity to compensate for technique differences, and ensuring comparability with the dust standard based on British data. Only small rounded opacities and large opacities were of concern in this report, and a summary reading was obtained for each abnormality. Progression rates from 0/0, 0/1, and 1/0 were 1.9, 13.6, and 18.2 percent, respectively. Incidence and progression of small, rounded opacities were consistent with values predicted from dose response curves developed by the British interpolation at a concentration derived from US compliance standards. Results showed that the incidence of pneumoconiosis in US miners was reduced through application of the current 2 milligrams per cubic meter (mg/m3) standard. The authors conclude that because of the long developmental period for pneumoconiosis, observation of the consequences of a lifetime exposure to 2mg/m3 will be necessary for the validity of the standard to be verified as an appropriate regulatory dust exposure concentration. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Dust Occupational Exposure Occupational Health Particulate Matter Radiography Respiratory System Respiratory Tract Diseases Risk Assessment Safety
• Keywords:
  Airborne-particles Author Keywords: Coal Mining Coalworkers Pneumoconiosis Disease-incidence Dust Exposure Employee-exposure Exposure-limits Health-standards Incidence Industrial-dusts Medical-research NIOSH-Author Occupational-exposure Occupational-respiratory-disease Radiographic-analysis Risk-analysis X-ray Reading

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• ISSN:
  0271-3586
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DRDS - Division of Respiratory Disease Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  407-415
• Volume:
  6
• Issue:
  6
• NIOSHTIC Number:
  nn:00144234
• Citation:
  Am J Ind Med 1984 Nov; 6(6):407-415
• Contact Point Address:
  M. Attfield, Division of Respiratory Disease Studies, NIOSH, 944 Chestnut Ridge Road. Morganwwn, West Virginia 26505
• Federal Fiscal Year:
  1985
• Peer Reviewed:
  True
• Source Full Name:
  American Journal of Industrial Medicine
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:32d0db71a8f1ca8ef3158ef16e80391a4e63f341e9e451abb859069bb38bf5f8ed34ccb10ccf3bfae9747d67eb47292ff839f2940e4a065815b0a45f760979dc
• Download URL:
  https://stacks.cdc.gov/view/cdc/184801/cdc_184801_DS1.pdf
• File Type:
  [PDF - 514.10 KB ]