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A tutorial on sample size calculation for multiple-period cluster randomized parallel, cross-over and stepped-wedge trials using the Shiny CRT Calculator.
It has long been recognized that sample size calculations for cluster randomized trials require consideration of the correlation between multiple observations within the same cluster. When measurements are taken at anything ...
Facedown Positioning Following Surgery for Large Full-Thickness Macular Hole: A Multicenter Randomized Clinical Trial.
(American Medical Association, 2020-05-07)
Importance: The value of facedown positioning following surgery for large full-thickness macular holes is unknown. Objective: To determine whether advice to position facedown postoperatively improves the outcome for large ...
Sample size and power calculations for open cohort longitudinal cluster randomized trials.
(John Wiley and Sons, 2020-03-04)
When calculating sample size or power for stepped wedge or other types of longitudinal cluster randomized trials, it is critical that the planned sampling structure be accurately specified. One common assumption is that ...
Improving the healthcare response to domestic violence and abuse in UK primary care: interrupted time series evaluation of a system-level training and support programme.
(Springer Nature, 2020-03-05)
BACKGROUND: It is unknown whether interventions known to improve the healthcare response to domestic violence and abuse (DVA)-a global health concern-are effective outside of a trial. METHODS: An observational interrupted ...