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Epidemiology by DesignA Causal Approach to the Health Sciences$
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Daniel Westreich

Print publication date: 2019

Print ISBN-13: 9780190665760

Published to Oxford Scholarship Online: December 2019

DOI: 10.1093/oso/9780190665760.001.0001

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PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. 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 June 2021

Causal Impact

Causal Impact

From Exposures to Interventions

(p.203) 9 Causal Impact
Epidemiology by Design

Daniel Westreich

Oxford University Press

In Chapter 9, the author discusses the causal impact framework, an approach to epidemiologic methods that can be used to move from internally valid estimates to externally valid estimates to valid estimates of the effects of population interventions. Such work is essential if epidemiologists want the results of their experimental or observational studies to directly inform public health policy decisions. The bulk of this chapter outlines and describes an approach to epidemiologic methods relevant to implementation science. The author summarizes the entire book by briefly addressing the lessons of the previous chapters for the so-called hierarchy of evidence (hierarchy of study designs).

Keywords:   causal impact, internal validity, external validity, exposure effect, population intervention effect, implementation science

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