Generalizability of randomized trial results to target populations: Design and analysis possibilities.

Generalizability of randomized trial results to target populations: Design and analysis possibilities.
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DOI:
10.1177/1049731517720730
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发表时间:
2018-07
影响因子:
1.8
通讯作者:
Westreich D
Westreich D
中科院分区:
法学3区
文献类型:
--
作者:
Stuart EA;Ackerman B;Westreich D

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随机试验在评估一项政策或社会工作计划对特定人群的影响方面发挥着重要作用。虽然大多数试验设计受益于强大的内部效度,但它们往往缺乏外部效度,或对感兴趣的目标人群的普遍性。换句话说,人们可以从随机试验中获得研究样本平均治疗效果(SATE)的无偏估计;然而,如果研究样本不能完全代表目标人群,这个估计可能不等于目标人群平均治疗效果(TATE)。本文概述了通过统计方法和研究设计来评估和改进随机试验概括性的现有策略,并就如何在社会工作研究中实施这些想法提出了建议。
Randomized trials play an important role in estimating the effect of a policy or social work program in a given population. While most trial designs benefit from strong internal validity, they often lack external validity, or generalizability, to the target population of interest. In other words, one can obtain an unbiased estimate of the study sample average treatment effect (SATE) from a randomized trial; however, this estimate may not equal the target population average treatment effect (TATE) if the study sample is not fully representative of the target population. This paper provides an overview of existing strategies to assess and improve upon the generalizability of randomized trials, both through statistical methods and study design, as well as recommendations on how to implement these ideas in social work research.
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