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病例-对照研究
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临床试验的自适应性设计
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case-control study
病例-对照研究
比较一组患某病的病人(病例组)和一组未患此种病的人(对照组),过去暴露于某种或几种可疑病因因素的差异的一种流行病学调查的方法。又称回顾性研究。
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Swear By God
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