Prevalence of multiple exposures to occupational hazards in some industries in China

[...]it was found that noise combined with benzene−toluene−xylene exposures in painting workshops of automobile manufacturing enterprises had a positive influence on the systolic blood pressure of workers. 7 Male occupational exposures to multiple solvents (benzene, methylene chloride, toluene, trichloroethylene, perchloroethylene, and 1,1,1-trichloroethane) increased the risk of amyotrophic lateral sclerosis. 8 Nevertheless, the current understanding of the health effects of multiple exposures is far from sufficient. [...]when analyzing multiple exposures, this study could not identify the weight of exposure time and dose of each hazard. [...]the sample selection of this study is nonrandom sampling, which may have potential bias. [...]multiple exposures of industrial workers to occupational hazards are prevalent, and BTXE, noise, nonmetallic dust, alcohols, ketones, esters, and acids often cross-link to form a significant coexposure cluster in industrial workers.