<it>A priori </it>postulated and real power in cluster randomized trials: mind the gap

<p>Abstract</p> <p>Background</p> <p>Cluster randomization design is increasingly used for the evaluation of health-care, screening or educational interventions. The intraclass correlation coefficient (ICC) defines the clustering effect and be specified during planning....

Full description

Bibliographic Details
Main Authors: Giraudeau Bruno, Guittet Lydia, Ravaud Philippe
Format: Article
Language:English
Published: BMC 2005-08-01
Series:BMC Medical Research Methodology
Online Access:http://www.biomedcentral.com/1471-2288/5/25