Use of data from X-ray screening program for coal workers to evaluate effectiveness of 2 mg/m3 coal dust standard

Journal of Occupational Medicine. : Official Publication of the Industrial Medical Association
R AlthouseS Kellie

Abstract

The National Institute for Occupational Safety and Health administers the X-ray Screening Program for underground coal miners, a program mandated by the Federal Mine Health and Safety Act of 1969. The screening file, with over 200,000 x-ray films, affords an excellent source for the study of prevalence and progression of Coal Workers' Pneumoconiosis. Two epidemiological analyses have recently been completed. One, a prevalence study of miners with 10 or fewer years of mining tenure, converted screening readings to median epidemiological readings. Converted prevalences were 0.44% for the group with 0 to 1 year tenure and 0.79% for the group with 1 to 9 years tenure. This result is similar to prevalence observed in a study of nonexposed blue collar workers. A second analysis reread x-ray films of a subgroup of 1,834 repeat miners with roughly 9 years exposure only under mandated dust standards. Net progression from category 0/0 was observed to be 1.2%. This value is consistent with 1.9%, based on an average dust exposure, predicted by British research. Results must be interpreted in light of several possible sources of bias.

Citations

Sep 20, 2005·Occupational and Environmental Medicine·V C dos S AntaoM D Attfield
May 18, 2013·American Journal of Public Health·A Scott Laney, Michael D Attfield
Jul 1, 1992·American Journal of Public Health·M D Attfield, R B Althouse
Jul 1, 1992·American Journal of Public Health·M D Attfield
Mar 1, 1990·The New England Journal of Medicine·M R CullenL Rosenstock

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