病因与因果推断l 病因研究是流行病学的主要内容之一。l 形成正确的因果思维方式和理解研究结果。l 指导基础、临床、预防的病因研究。2 主要内容病因概念和病因模型1因果关联的推断标准4统计关联到因果关联3因果推断的逻辑方法23病因的概念4 鬼神、上帝、天意人金木水 火土气人活的传染物人病原物环境宿主生物社 会物质机体迷信阶段朴素唯物主义生物学病因的萌芽轮状模式三角模式Lilienfeld的病因定义A causal relationship would be recognized to exist whenever evidence indicates that the factors from part of the complex of circumstances that increases the probability of the occurrence of disease and that a diminution of one or more of these factors decreases the frequency of that disease.病因概念的发展5现
