What Is an Intracluster Correlation Coefficient? Crucial Concepts for Primary Care Researchers
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Open Access
- 1 May 2004
- journal article
- Published by Annals of Family Medicine in Annals of Family Medicine
- Vol. 2 (3) , 204-208
- https://doi.org/10.1370/afm.141
Abstract
BACKGROUND Primary care research often involves clustered samples in which subjects are randomized at a group level but analyzed at an individual level. Analyses that do not take this clustering into account may report significance where none exists. This article explores the causes, consequences, and implications of cluster data.Keywords
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