Results 301 to 310 of about 2,961,303 (350)
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Planning stepped wedge cluster randomized trials to detect treatment effect heterogeneity
Statistics in Medicine, 2023Stepped wedge design is a popular research design that enables a rigorous evaluation of candidate interventions by using a staggered cluster randomization strategy.
Fan Li +4 more
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Radiology, 1978
An aluminum step-wedge filter placed far from the film cassette provides the constant variation of subject contrast required for quantitative sensitometry while virtually eliminating scatter radiations. Attenuation curves made with this configuration are almost exponentially linear.
J, Hale, P, Bloch
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An aluminum step-wedge filter placed far from the film cassette provides the constant variation of subject contrast required for quantitative sensitometry while virtually eliminating scatter radiations. Attenuation curves made with this configuration are almost exponentially linear.
J, Hale, P, Bloch
openaire +2 more sources
Bayesian optimal stepped wedge design
Biometrical Journal, 2023AbstractRecently, there has been a growing interest in designing cluster trials using stepped wedge design (SWD). An SWD is a type of cluster–crossover design in which clusters of individuals are randomized unidirectional from a control to an intervention at certain time points.
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Statistics & Probability Letters, 2015
Stepped wedge randomised trials are increasingly popular. Here we derive the optimal design for a fixed number of periods; this does not allocate an equal number of cluster units to each treatment sequence as might otherwise have been expected.
Jock Lawrie +2 more
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Stepped wedge randomised trials are increasingly popular. Here we derive the optimal design for a fixed number of periods; this does not allocate an equal number of cluster units to each treatment sequence as might otherwise have been expected.
Jock Lawrie +2 more
openaire +1 more source
Journal of the American Medical Association (JAMA)
Importance Sepsis screening is recommended among hospitalized patients but is supported by limited evidence of effectiveness. Objective To evaluate the effect of electronic sepsis screening, compared with no screening, on mortality among hospitalized ...
Y. Arabi +46 more
semanticscholar +1 more source
Importance Sepsis screening is recommended among hospitalized patients but is supported by limited evidence of effectiveness. Objective To evaluate the effect of electronic sepsis screening, compared with no screening, on mortality among hospitalized ...
Y. Arabi +46 more
semanticscholar +1 more source
Power analysis for stepped wedge trials with multiple interventions
Statistics in Medicine, 2022Stepped 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
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Variance formulae for multiphase stepped wedge cluster randomized trial
Statistics in Medicine, 2020AbstractIn 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
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The Lancet
BACKGROUND Whole-blood donors are at increased risk for iron deficiency and anaemia. The current standard of haemoglobin monitoring is insufficient to ensure the maintenance of proper iron reserves and donor health.
A. Meulenbeld +7 more
semanticscholar +1 more source
BACKGROUND Whole-blood donors are at increased risk for iron deficiency and anaemia. The current standard of haemoglobin monitoring is insufficient to ensure the maintenance of proper iron reserves and donor health.
A. Meulenbeld +7 more
semanticscholar +1 more source
Design and analysis of stepped wedge cluster randomized trials
Contemporary Clinical Trials, 2007Cluster 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
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TVZ - Verpleegkunde in praktijk en wetenschap, 2021
Janneke de Man-Van Ginkel, Roelof Ettema
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Janneke de Man-Van Ginkel, Roelof Ettema
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