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Article
A spotter’s guide to study designs
Evidence Based Medicine for Primary Care and Internal Medicine
  • Carl J. Heneghan, University of Oxford
  • Paul Glasziou, Bond University
Date of this Version
1-1-2009
Document Type
Journal Article
Publication Details

Published version

Glasziou, P. & Heneghan, C. (2009). A spotter’s guide to study designs. Evidence Based Medicine for Primary Care and Internal Medicine, 14(2), 37-38

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© Copyright The Authors, 2009

Disciplines
Abstract
When searching for evidence to answer our clinical questions, the ability to rapidly recognise different types of studies is helpful for finding the one that best answers the question. The “Levels of evidence” tables make suggestions for which design is best for which type of question. For instance, you would naturally consider a randomised controlled trial as the most appropriate study design for intervention decisions. But for potential harms of interventions, we may need case-control studies. And for aetiology we often need to use cohort studies: you wouldn’t randomise someone to cigarette smoking to see if they did worse—this would also be unethical. But you would want investigators to follow up cigarette smokers and non-smokers for a long time, just as Richard Doll did.1
Citation Information
Carl J. Heneghan and Paul Glasziou. "A spotter’s guide to study designs" Evidence Based Medicine for Primary Care and Internal Medicine Vol. 14 Iss. 2 (2009) p. 37 - 38 ISSN: 1473-6810
Available at: http://works.bepress.com/paul_glasziou/78/