DENVER — Among residents of urban environments, the highest levels of exposure to environmental trichloroethylene is associated with a 24% increase in risk ofTCE has long been used as an industrial solvent, and it is a component of several household cleaning products. Case reports have suggested that workers exposed to it have increased risk of Parkinson's disease, with risk increases as high as 500%.
Previous studies of TCE had looked primarily at occupational exposure, such as workers at TCE-emitting facilities, or soldiers stationed at Camp Lejeune in North Carolina, where levels of TCE were more than 70-fold higher than EPA-permissible levels. AIn an interview, Dr. Krzyzanowski pointed out that the Camp Lejeune studies didn't assign TCE exposure to individuals — instead, researchers noted whether an individual was stationed at that base or another.
"We found a nationwide association between airborne TCE exposure and Parkinson's disease risks, but this was only true for the metropolitan areas. Within these metro areas, there was a dose-response effect, where increasing levels of TCE were associated with increasing risk of Parkinson's disease. In particular, those living in the metros with the highest levels of TCE had a 24% greater risk of Parkinson's compared with those in metros with the lowest levels of TCE," Dr.
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