The basic premise of a stepped wedge cluster randomised trial (SW-CRT) is that all clusters start in the control condition, and they switch to the intervention condition in an order determined by randomisation. SW-CRTs differ from cluster crossover trials in that the switch is only in one ...
The stepped wedge cluster randomised trial: Rationale, design, analysis, and reporting 2015, BMJ (Online) An introduction to implementation science for the non-specialist 2015, BMC Psychology Risk prediction models: II. External validation, model updating, and impact assessment 2012, Heart The stepped...
A stepped wedge design can be… (and should be, wherever possible) randomised Used with individuals or with clusters as the ‘steps’ But isn’t… A step wedge A cross-over trial A multiple baseline study Advantages Solves ethical dilemma of withholding the intervention when not in equipoise...
The stepped wedge cluster randomised trial: Rationale, design, analysis, and reporting While not exclusively for the evaluation of service delivery interventions, it is particularly suited to evaluations that do not rely on individual patient recruitment. As in all cluster trials, stepped wedge trials...
Sample size determination through power simulation; practical lessons from a stepped wedge cluster randomised trial (SW CRT). Trials. 2011;12(1):1. Article Google Scholar Scott JM, Juraska M, Fay MP, Gilbert PB. Finite-sample corrected generalized estimating equation of population average ...
S1 Stepped Wedge Designs with Multiple Interventions Vivian H Lyons, Lingyu Li, James Hughes, Ali Rowhani-Rahbar S2 Analysis of the cross-sectional stepped wedge cluster randomised trial Karla Hemming, Monica Taljaard, Andrew ForbesI1 Introduction Mona Kanaan, Noreen Dadirai Mdege, Ada Keding Depar...
1. Sample size determination through power simulation; practical lessons from a stepped wedge cluster randomised trial (SW CRT) [J] . Munyaradzi Dimairo, Mike Bradburn, Stephen J Walters Trials . 2011,第SUPPLEMENTa1期 机译:通过功效模拟确定样本量;逐步楔形聚类随机试验(SW CRT)的实际课程 2....
The study employs a stepped-wedge cluster-randomised controlled community trial design in 16 communities over fivemonthly visits. During each visit, we will collect data on participants' source of drinking and cooking water and measure the salinity level and electrical conductivity of household stored ...
Bayesian D-optimal designs can be readily identified for stepped-wedge cluster randomised trials with binary outcome data. In certain circumstances, principally ones with strong time period effects, they will indicate that a design unlikely to have been identified by previous methods may be ...
There is limited guidance on the design of stepped wedge cluster randomised trials. Current methodological literature focuses mainly on trials with cross-sectional data collection at discrete times, yet many recent stepped wedge trials do not follow this design. In this article, we present a typology...