Selection bias and subject refusal in a cluster-randomized controlled trial

Abstract Background Selection bias and non-participation bias are major methodological concerns which impact external validity. Cluster-randomized controlled trials are especially prone to selection bias as it is impractical to blind clusters to their allocation into intervention or control. This st...

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Bibliographic Details
Main Authors: Rochelle Yang, Barry L. Carter, Tyler H. Gums, Brian M. Gryzlak, Yinghui Xu, Barcey T. Levy
Format: Article
Published: BMC 2017-07-01
Series:BMC Medical Research Methodology
Online Access: