A method to identify counties with potential non-occupational asbestosis mortality.
Linch-K; Middendorf-P; Althouse-R; Syamlal-G
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas. Fairfax, VA: American Industrial Hygiene Association, 2003 May; :70-71
Counties with possible high non-occupational asbestosis mortality rates were identified by comparing their actual asbestos mortality rate to predicted based on their estimated occupational exposure to asbestos. To estimate county exposures, industries with asbestos exposures were identified using national exposure data. National mean exposures in these industries were multiplied by the number employed (obtained from Bureau of Census County Business Patterns data for 1982) in these industries for each county. The results within each county were summed and then divided by the total county employment to provide an overall county occupational exposure index. This index was then regressed on the observed asbestosis mortality rate for each county for the years 1989 to 1998. Counties lying outside of the upper 67, 95, and 99 percent confidence limits were identified as potentially having excess asbestosis mortality unexplained by the model, possibly due to non-occupational asbestos exposure. Counties were classified as having "probable" non-occupational asbestos exposure (those falling within the region defined by the 67 and 95 percent limits), "highly probable" non-occupational asbestos exposure (those falling within the region defined by the 95 and 99 percent limits), and "very highly probable" non-occupational asbestos exposure (those beyond the 99 percent limit). Counties identified as having high asbestosis mortality but low apparent occupational risks are candidates for follow-up investigation to determine cause.
Mortality-rates; Occupational-exposure; Asbestosis; Exposure-levels; Mortality-data; Models; Respiratory-system-disorders; Pulmonary-system-disorders; Surveillance
American Industrial Hygiene Conference and Exposition, May 10-15, 2003, Dallas, Texas