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epidemiological experimental study
释义
epidemiological experimental study
Encyclopedia
医学
流行病学实验研究
释
epidemiological experimental study
流行病学实验研究
将研究人群(病人或正常人)随机分为实验组和对照组,研究者对实验组人群施加或除去某种干预措施后,随访观察一段时间并比较两组人群疾病或健康状态的改变,对比分析实验组与对照组之间结局的差别,以验证研究假设和考核干预措施效果的一种实验方法。又称实验流行病学、干预研究等。
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countable simplicial complex
countable space
countable subadditivity
countable subset
countable sum axiom
countable superadditivity
countable support iterated forcing
countable system
countable transitive model
countable union
countable-valued logic
countable weight
countably additive
countably additive algebra
countably additive class
countably additive family
countably additive function
countably additive measure
countably compact
countably compact set
countably compact space
countably continuous operator
countably equivalent sets
countably generated module
countably Hilbertian space
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