In occupational health field, the role of occupational risk factors in disease development is very important. Estimation of job role in disease development in the presence of multiple risk factors is essential in legal and judicial issues especially in legal medicine commissions and in response to inquiry of insurer organizations. In Iran, there is no unique method for estimation of job role in disease development and it seems that an academic and executive defect exists in regard to this issue. In this article, we introduce an epidemiological method for estimation of job role in a disease in the presence of multiple risk factors. We hope that this article acts as a prologue for compilation of scientific documents with unique approach in our country. 
 

Keywords: Occupational disease, Occupational exposure, Risk factor, Job role

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