“Cohort study”的概念、定义、翻译、参考文献-科学参考

单词	Cohort study
释义	Cohort study Encyclopedia 医学流行病学研究的统计学设计释 Cohort study队列研究统计学设计从目标人群选取未患某研究疾病的代表性样本，按是否暴露于某个可疑因素分为暴露组（或不同暴露水平的亚组）和非暴露组，随访观察一段时间后，比较不同组（或亚组）之间疾病的发病率或死亡率差异，从而判定暴露因素与疾病有无关联及关联大小的一种分析性研究方法。
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