能否具体介绍一下病例对照研究，队列研究和横断面研究？ - 知乎
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娜娜. MD MPH. 1、病例对照：从病人出发回头看. e.g.收集一群肺癌病人和一群没肺癌的，对比他们吸烟史的区别。. 2、队列：从暴露情况向后看. e.g.收集一群吸烟的和一群不吸烟的，对比他们日后的肺癌的几率。. 3、横断面研究：发病及暴露史的snapshot. e.g.选择某一 ...
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