职业流行病学的任务之一是确定接触水平一反应关系,为推荐职业性接触限值提供依据,因而职业流行病学调查的结果是否可靠取决于对接触水平和对健康影响的评价。评价接触水平则是职业流行病学调查中最困难的工作。本文以化学物接触为重 One of the tasks of occupational epidemiology is to establish a contact-level-response relationship that provides the basis for recommending occupational exposure limits and therefore the reliability of the results of occupational epidemiological investigations depends on the assessment of the level of exposure and health effects. Evaluation of exposure levels is the most difficult job in occupational epidemiological investigations. This article focuses on chemical exposure