Estimation of cumulative exposures for the national study of coal workers' pneumoconiosis.
Seixas-NS; Moulton-LH; Robins-TG; Rice-CH; Attfield-MD; Zellers-ET
Appl Occup Environ Hyg 1991 Dec; 6(12):1032-1041
A study was conducted to estimate the levels of personal exposures to respirable coal mine dust for a cohort of underground coal miners who have been under study since the early 1970s. The cohort was selected from Round Four of the National Study of Coal Workers' Pneumoconiosis. A subgroup chosen for this study included 1270 miners for whom the first mining job recorded in their work history began in 1970 or later. A procedure was developed using a sample of the Mine Safety and Health Administration's exposure data for estimating mean exposures by three way occupation/mine/year specific strata. Cumulative dust exposure was then calculated for each cohort member. A total of 293,292 samples were used in the analysis which represented exposure in 36 mines, including 31 face occupations, 20 underground nonface occupations, and 14 supervisory jobs. Cumulative exposure was compared with years worked and years worked underground. The correlation coefficients between cumulative exposure and years worked and between cumulative exposure and years underground were 0.59 and 0.71, respectively.
NIOSH-Publication; NIOSH-Author; NIOSH-Grant; Pulmonary-system-disorders; Dust-exposure; Coal-dust; Mining-industry; Underground-mining; Respiratory-system-disorders; Airborne-dusts; Epidemiology; Analytical-methods; Long-term-study
Environmental & Indust Health University of Michigan Dept of Envir/indust Health AN Arbor, MI 48109-2029
Applied Occupational and Environmental Hygiene
University of Michigan at Ann Arbor, Ann Arbor, Michigan