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Bias in identifying and recruiting participants in cluster randomised trials: what can be done?

Eldridge, Sandra, Kerry, Sally and Torgerson, David J. (2009) Bias in identifying and recruiting participants in cluster randomised trials: what can be done? British Medical Journal. b4006. -. ISSN 0959-8146

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Abstract

(Summary Points) . Poor design of cluster trials risks bias in selection of participants. . Ideally participants should be identified before the cluster is randomised. . When this is not possible recruitment should be by someone masked to the cluster allocation. . Statistical solutions to selection bias are less satisfactory than design solutions. . Cluster trials need to report cluster sizes to enable the readers to ascertain any differences in recruitment between treatment groups.

Item Type: Article
Copyright, Publisher and Additional Information: © 2009 BMJ Publishing Group. This is an author produced version of a paper published in the BMJ. Uploaded in accordance with the publisher's self archiving policy.
Keywords: PRIMARY-CARE, GENERAL-PRACTITIONERS, SELECTION BIAS, PREVENTION, INTERVENTION, BEHAVIOR, RISK, Medicine
Institution: The University of York
Academic Units: The University of York > Health Sciences (York)
Depositing User: Repository Administrator York
Date Deposited: 10 Nov 2009 15:32
Last Modified: 14 Oct 2014 09:21
Published Version: http://dx.doi.org/10.1136/bmj.b4006
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/10122

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