Date of Award
January 2018
Degree Type
Restricted Access Thesis
Document Type
Master Thesis
Degree Name
Master of Science (MS)
Department
Safety, Security, and Emergency Management
First Advisor
James P. Klyza
Department Affiliation
Environmental Health Science
Second Advisor
Clint Pinion, Jr.
Department Affiliation
Environmental Health Science
Third Advisor
E. Scott Dunlap
Department Affiliation
Safety, Security, and Emergency Management
Abstract
Objectives
The health effects of occupational exposure to silica dust include silicosis and an increased risk of lung cancer. This study estimates the effect of regional location on coal mine employee exposure to crystalline silica, and the odds of a coal workers pneumoconiosis diagnosis.
Study Design
The MSHA datasets cover all enforcement cases from 1970 to present, and include employee personal sampling results for respirable silica dust. The EIA coal production datasets cover from 1949 to present and include coal tonnage by type and mine location.
Methods
The SAS 9.4 statistical program was used in analysis. Descriptive statistics, analysis of covariance, and logistic regression were used to test the effect of region (Appalachian or Rocky Mountains) on coal miner incidence of CWP and silicosis.
Results
The ANACOVA model results were significant [F (5, 25683) = 205.9, p <0.0001]. The mining region had a statistically significant (p<0.0001) effect of approximately 1.1 mg/m3 greater silica exposure in an Appalachian Region coal mine versus an Rocky Mountains Region coal mine. In addition, log10 [coal production], respirator use, and coal mining facility type were statistically significant adjustments to the model.
The overall logistic regression model results were significant [X2 (5, 24695) = 126.4, p <0.0001]. Region of mine (Appalachian or Rocky Mountains) was statistically significant (p<0.0001) with increased odds of CWP for employees working in the Appalachian mines (OR = 2.75, CI: 2.16, 3.56). In addition, log10 [respirable silica personal sample], respirator use, MSHA violation, and year were statistically significant adjustments to the model.
Conclusions
The Appalachian mountain region coal miners had significantly higher exposure to silica, and significantly greater odds of CWP.
Copyright
Copyright 2018 Amanda Fugate Sheffel
Recommended Citation
Sheffel, Amanda Fugate, "Appalachian Coal Miners At Greater Risk For Silica Exposure than Rocky Mountains" (2018). Online Theses and Dissertations. 582.
https://encompass.eku.edu/etd/582