Representativeness of samples from general practice lists in epidemiological studies: case-control study

Smith, A.G., Roman, E., Fear, N.T. and Law, G.R. (2004) Representativeness of samples from general practice lists in epidemiological studies: case-control study. BMJ. p. 932. ISSN 0959-8138

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Abstract

Ethical constraints often prevent epidemiological studies from evaluating the impact of non-participation. Particular problems may arise when subjects fail to respond to an approach by researchers or when they cannot be contacted because of inaccurate contact details or a doctor's refusal to give permission for their patient to be approached. If these subjects differ from those subjects who agree or decline to participate then the validity and generalisability of the study may be compromised. We investigated these issues in a case-control study of acute leukaemia in England.

Item Type:	Article
Copyright, Publisher and Additional Information:	© 2004 BMJ Publishing Group.
Academic Units:	The University of York > Health Sciences (York)
Depositing User:	Repository Officer
Date Deposited:	28 Nov 2008 11:31
Last Modified:	19 Feb 2013 11:54
Published Version:	http://dx.doi.org/10.1136/bmj.38029.672662.AE
Status:	Published
Refereed:	Yes
Related URLs:	http://dx.doi.org/10.1136/bmj.38029.6726...
URI:	http://eprints.whiterose.ac.uk/id/eprint/4907

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