Estimating intra-cluster correlation coefficients for planning longitudinal cluster randomized trials: a tutorial

Y Ouyang, K Hemming, F Li… - International Journal of …, 2023 - academic.oup.com
It is well-known that designing a cluster randomized trial (CRT) requires an advance
estimate of the intra-cluster correlation coefficient (ICC). In the case of longitudinal CRTs …

A systematic review of sample size estimation accuracy on power in malaria cluster randomised trials measuring epidemiological outcomes

J Biggs, JD Challenger, J Hellewell… - BMC medical research …, 2024 - Springer
Abstract Introduction Cluster randomised trials (CRTs) are the gold standard for measuring
the community-wide impacts of malaria control tools. CRTs rely on well-defined sample size …

Maintaining the validity of inference from linear mixed models in stepped-wedge cluster randomized trials under misspecified random-effects structures

Y Ouyang, M Taljaard, AB Forbes… - Statistical Methods in …, 2024 - journals.sagepub.com
Linear mixed<? show [AQ ID= GQ2 POS=-18pt]?><? show [AQ ID= GQ4]?><? show [AQ ID=
GQ5 POS= 12pt]?> models are commonly used in analyzing stepped-wedge cluster …

Optimal allocation of clusters in stepped wedge designs with a decaying correlation structure

M Moerbeek - Plos one, 2023 - journals.plos.org
The cluster randomized stepped wedge design is a multi-period uni-directional switch
design in which all clusters start in the control condition and at the beginning of each new …

Estimates of intra-cluster correlation coefficients from 2018 USA Medicare data to inform the design of cluster randomized trials in Alzheimer's and related dementias

Y Ouyang, F Li, X Li, J Bynum, V Mor, M Taljaard - Trials, 2024 - Springer
Abstract Background Cluster randomized trials (CRTs) are increasingly important for
evaluating interventions embedded in health care systems. An essential parameter in …

Shared Control Individuals in Health Policy Evaluations with Application to Medical Cannabis Laws

NJ Seewald, EE McGinty, K Tormohlen… - arXiv preprint arXiv …, 2023 - arxiv.org
Health policy researchers often have questions about the effects of a policy implemented at
some cluster-level unit, eg, states, counties, hospitals, etc. on individual-level outcomes …