Two approaches for the analysis of cluster-randomized trials can be distinguished, and the chosen method has to be adequately incorporated in sample size calculation. In cluster-level analyses, summary measures are calculated for each cluster condensing the data to be included in the analysis to a...
Cluster Randomized Trials Michael J. Campbell Get Access Abstract A cluster randomized trial is one in which groups of subjects are randomized rather than individuals. They are sometimes known as group randomized trials. This chapter will describe the design and analysis of such trials. Examples ...
In many intervention studies, therapy outcome evaluations, and educational field trials, random treatment assignment of clusters rather than persons is des... SW Raudenbush - 《Psychological Methods》 被引量: 660发表: 1997年 Sample size for cluster randomized trials: effect of coefficient of variati...
Group-randomized (also known as cluster randomized) trials are those trials where the unit of randomization is one of the several types of groups rather than an individual. From: Principles and Practice of Clinical Research (Fourth Edition), 2018 ...
clusterrandomizedcontrolledtrials整群随机对照试验 系统标签: randomizedclustertrialscontrolledrandomization对照 JournalofEvaluationinClinicalPractice, 11 ,5,479–483doi:10.1111/j.1365-2753.2005.00568.x © 2005BlackwellPublishingLtd 479 BlackwellScience,LtdOxford,UKJEPJournalofEvaluationinClinicalPractice1356-1294Bla...
The use of Stepped Wedge cluster randomized trials: Systematic Review Dr Celia Taylor The University of Birmingham On behalf of my co-authors: Noreen Mdege, Mei-See Man and David Torgerson (University of York) Today’s presentation What is a stepped wedge design? What are the advantages and...
Randomized controlled trials are considered the "gold standard" for evaluating the effectiveness of medical interventions. Sometimes, instead of randomizing individuals, it is preferable to randomize groups. Cluster randomized trials (CRTs) are used when intervention must be applied at a group level, ...
cluster randomized controlled trials:整群随机对照试验 下载积分: 1000 内容提示: Journal of Evaluation in Clinical Practice, 11 , 5, 479–483 doi:10.1111/j.1365-2753.2005.00568.x © 2005 Blackwell Publishing Ltd 479 Blackwell Science, LtdOxford, UKJEPJournal of Evaluation in Clinical Practice1356...
O’Malley, MD, MPH JAMA Internal Medicine Cluster randomized control trials (RCTs) are a form of prospective study where groups of individuals are allocated to an intervention. They offer the unique advantage of rigorously evaluating practices that cannot feasibly be randomized to the individual—...
BACKGROUND: The first applications of cluster randomized trials with three instead of two levels are beginning to appear in health research, for instance, in trials where different strategies to implement best-practice guidelines are compared. In such trials, the strategy is implemented in health car...