Quasi-experimental study designs series-paper 4: uses and value
Quasi-experimental study designs series-paper 4: uses and value
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DOI：
10.1016/j.jclinepi.2017.03.012
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发表时间：
2017-09-01
影响因子：
7.2
通讯作者：
Atun, Rifat
中科院分区：
文献类型：
--
作者：
Baernighausen, Till;Tugwell, Peter;Atun, Rifat
在流行病学和卫生系统研究中，越来越多地使用准实验研究来建立因果关系。准实验研究为增加和改进因果效应的证据提供了重要的机会：（1）在不可能进行随机对照试验的情况下，它们可以产生因果证据;（2）它们通常产生具有高度外部效度的因果证据;（三）他们避免了当非盲实验的参与者改变他们的行为以响应实验分配时出现的对内部有效性的威胁，（4）它们通常非常适合产生关于干预措施的长期健康结果以及非健康结果（如经济和社会后果）的因果证据;（5）它们通常可以比实验和其他干预研究更快、更低成本地产生证据。(C)2017爱思唯尔公司All rights reserved.
Quasi-experimental studies are increasingly used to establish causal relationships in epidemiology and health systems research. Quasi experimental studies offer important opportunities to increase and improve evidence on causal effects: (1) they can generate causal evidence when randomized controlled trials are impossible; (2) they typically generate causal evidence with a high degree of external validity; (3) they avoid the threats to internal validity that arise when participants in nonblinded experiments change their behavior in response to the experimental assignment to either intervention or control arm (such as compensatory rivalry or resentful demoralization); (4) they are often well suited to generate causal evidence on long-term health outcomes of an intervention, as well as nonhealth outcomes such as economic and social consequences; and (5) they can often generate evidence faster and at lower cost than experiments and other intervention studies. (C) 2017 Elsevier Inc. All rights reserved.