Results 291 to 300 of about 90,354 (334)

Mechanochemistry‐Assisted Solvent‐Free Supramolecular Engineering for Atomic‐Layered Carbon Nitride Nanosheets with Enhanced Photocatalytic Hydrogen Evolution

open access: yesAdvanced Functional Materials, EarlyView.
A solvent‐free mechanochemistry‐enabled supramolecular engineering strategy is developed to directly synthesize covalent‐interconnected two‐dimensional atomic‐layered carbon nitride nanosheets photocatalyst, bypassing conventional top‐down exfoliation requirements.
Fanglei Yao   +7 more
wiley   +1 more source

What Is a Stepped-Wedge Cluster Randomized Trial?

JAMA Internal Medicine
This Guide to Statistics and Methods describes design, interpretation, and examples of a stepped-wedge cluster randomized trial.
Fan Li, Bingkai Wang, P. Heagerty
semanticscholar   +3 more sources

Analysis of Data from a Stepped Wedge Trial

Analysis of Data from Randomized Controlled Trials, 2021
In this chapter the different methods for the analysis of data from a stepped wedge trial are discussed. These methods contain the comparison of different arms, the comparison of groups with a different number of intervention measurement, and the comparison of transitions.
J. Twisk
semanticscholar   +2 more sources

Stepped Wedge Cluster Randomized Trials: A Methodological Overview

World Neurosurgery, 2022
Stepped wedge cluster randomized trials enable rigorous evaluations of health intervention programs in pragmatic settings. In the present study, we aimed to update neurosurgeon scientists on the design of stepped wedge randomized trials.We have presented an overview of recent methodological developments for stepped wedge designs and included an update ...
Fan Li, Rui Wang
openaire   +2 more sources

Power analysis for stepped wedge trials with multiple interventions

Statistics in Medicine, 2022
Stepped wedge design (SWD) trials are cluster randomized trials that feature staggered, unidirectional cross‐over between treatment conditions. Existing literature on power for SWDs focuses primarily on designs with two conditions, typically a control and an intervention condition. However, SWDs with more than one treatment condition are being proposed
Phillip Sundin, Catherine M. Crespi
openaire   +2 more sources

Variance formulae for multiphase stepped wedge cluster randomized trial

Statistics in Medicine, 2020
AbstractIn a multiphase stepped wedge cluster randomized trial (MSW‐CRT), more than one intervention will be initiated on each sequence in a fixed order. Hence, with the MSW‐CRT design, the effect of the first intervention can be evaluated when compared to control, as well as the added‐on effects of the subsequent interventions.
Pengyue Zhang   +3 more
openaire   +3 more sources

Design and analysis of stepped wedge cluster randomized trials

Contemporary Clinical Trials, 2007
Cluster randomized trials (CRT) are often used to evaluate therapies or interventions in situations where individual randomization is not possible or not desirable for logistic, financial or ethical reasons. While a significant and rapidly growing body of literature exists on CRTs utilizing a "parallel" design (i.e.
Michael A, Hussey, James P, Hughes
openaire   +2 more sources

Information Content of Cluster–Period Cells in Stepped Wedge Trials

Biometrics, 2018
Summary Stepped wedge and other multiple-period cluster randomized trials, which collect data from multiple clusters across multiple time periods, are being conducted with increasing frequency; statistical research into these designs has not kept apace.
Jessica Kasza, Andrew B. Forbes
openaire   +3 more sources

Stepped wedge clinical trial

TVZ - Verpleegkunde in praktijk en wetenschap, 2021
Janneke de Man-Van Ginkel, Roelof Ettema
openaire   +1 more source

ORIENT stepped wedge trial statistical analysis plan

The statistical analysis plan to inform analysis of the ORIENT trial (ANZCTR Identifier: ACTRN12622000086763)
Kasza, Jessica   +4 more
openaire   +1 more source

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