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| Application of bayesian decision analysis in the assessment of benzene occupational exposure in one automobile manufacture enterprise |
| YANG Si-jia，TANG Ying，NING Yong，CHEN Jian
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| Shanghai，Center for Disease Control and Prevention Shanghai 200336，China |
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Abstract Objective To assess the exposure level of benzene of one automobile manufacture enterprise by bayesian decision analysis method，and to compare it with traditional evaluation method，thus to supply the reference for the benzene occupational protection in automobile manufacture enterprise.Methods Traditional statistical analysis method and bayesian decision analysis method which adopted the weighted expert method were used in evaluating benzene exposure level of hand spray-painted workers in an automobile manufacturing enterprise respectively，and the calculation results by these two methods were compared.Results Calculation results of bayesian decision analysis showed that exposure level of the similar exposure group is level 2（10%-50%LTWA）. The exposure level calculated by the traditional statistical method was higher than the one calculated by the bayesian decision analysis method，which was rated as level 3（50%-100% LTWA） or level 4（>100% LTWA）. The exposure level calculated by traditional statistical method and bayesian analysis method were concordant when the sample size is enough.Conclusion Traditional statistic method was likely to overestimating the exposure level when the sample was small. The bayesian decision analysis method which combined the experts’experience and surveillance data could solve the problem mentioned above.
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Published: 25 July 2018
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