Circulation:利用工具变量等统计方法做复杂的医疗决策

2020-07-16 MedSci原创 MedSci原创

许多医学和健康科学研究的目的是确定治疗或干预措施对健康结果的因果关系,而研究因果关系最强有力的证明往往要通过随机对照试验(Randomized Clinical Trials)来实现。而实际情况是,临

许多医学和健康科学研究的目的是确定治疗或干预措施对健康结果的因果关系,而研究因果关系最强有力的证明往往要通过随机对照试验(Randomized Clinical Trials)来实现。而实际情况是,临床上总存在着各种各样道德或实践的客观约束,最终导致研究者不可能进行随机对照。因此很多情况下研究者不得不使用观察性研究(Observational studies)来侧面佐证因果关系。          Causaility evidence strength by study types (picture modified from internet) 观察性研究有效性的主要挑战之一是无法测量的混杂因素(Unmeasured confounding )的存在(如某些在治疗前、治疗组和对照组之间存在无法量化的差异),这也极大地影响着因果验证的结果。统计学上,我们经常用工具变量分析(Instrumental Variable Analysis)这种方法来控制未测混杂因素。这种类型的分析需要找到合适的工具变量,这种工具变量(i)与未测量

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    2021-05-07 ms7000001221015212

    学习了

    0

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    2020-09-15 涪陵

    学习了!

    0

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    2020-08-27 14818eb4m67暂无昵称

    学习了

    0

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    2020-08-07 abcdefgaa

    666

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    2020-07-16 神盾医疗局局长Jack

    这一发现也冲击了传统的肥胖和帕金森关系的认知。

    0

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