Jump to ContentJump to Main Navigation
Critical Appraisal of Epidemiological Studies and Clinical Trials$
Users without a subscription are not able to see the full content.

Mark Elwood

Print publication date: 2007

Print ISBN-13: 9780198529552

Published to Oxford Scholarship Online: September 2009

DOI: 10.1093/acprof:oso/9780198529552.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (www.oxfordscholarship.com). (c) Copyright Oxford University Press, 2019. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 16 October 2019

Selection of subjects for study

Selection of subjects for study

Chapter:
(p.75) Chapter 4 Selection of subjects for study
Source:
Critical Appraisal of Epidemiological Studies and Clinical Trials
Author(s):

J. Mark Elwood

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198529552.003.04

This chapter deals with how subjects are selected for inclusion in analytical and intervention studies. To interpret a study, one must assess the problems that may have been overcome, or introduced, by the methods used to select subjects for the study. In observational cohort studies, one has to select subjects who are or have been exposed to the putative causal factor and a suitable comparison group who are unexposed or less exposed. In the case-control design, one has to select subjects in whom the outcome has occurred (cases) to compare with subjects in whom the outcome has not occurred (controls). In intervention studies, one selects subjects who are suitable and willing to have either the intervention being assessed or the alternative with which it is compared, which may be no intervention. Part 1 of this chapter covers the general principles, and Part 2 illustrates the application of these principles to each type of study. Self-test questions are provided at the end of the chapter.

Keywords:   subject selection, analytical studies, intervention studies, observational studies, putative causal factor

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .