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Using evidence to guide practice in health protection 

Using evidence to guide practice in health protection
Chapter:
Using evidence to guide practice in health protection
Author(s):

Merav Kliner

, Ewan Wilkinson

, and Sam Ghebrehewet

DOI:
10.1093/med/9780198745471.003.0024
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date: 23 September 2017

This chapter describes the importance of evidence-based decisions in health protection practice. It describes the hierarchy of evidence, from systematic reviews of randomized controlled trials to case reports and opinion. The chapter emphasizes the importance of assessing methodological quality, the quality of the evidence, and the risks of different types of bias. For policy to be as robust as possible it should be based on the best available evidence, and much evidence is useful even when it isn’t used in policy. Therefore, in this chapter, tools are described for reaching evidence-based recommendations, including the Evidence to Decision Framework. Factors that may influence policy development are reviewed, including social and political pressures that may impede evidence-based policy. Finally, the chapter considers critical appraisal of policy using the AGREE II tool.

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