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4 - Retrieving the data
- By John Carlisle, Department of Anaesthetics, NHS Torbay Hospital, Torquay, Devon, UK
Edited by Ann Møller, KAS Herlev, Copenhagen, Tom Pedersen, Rigshospitalet, Copenhagen
Book:

Evidence-based Anaesthesia and Intensive Care

Published online:

05 September 2009

Print publication:

09 October 2006, pp 19-27
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Summary

This chapter discusses the methods of data retrieval and storage that help us to subsequently extract and analyse outcomes, bias and confounding factors, with particular reference to the systematic review of experimental studies. It helps us to begin by planning, piloting and redrafting our data extraction form. We can retrieve the data for each study into a separate paper, record, and then compare the results and integrate them, usually systematically by transferring the extracted data into a program like RevMan. The electronic retrieval form is a convenient place to record our search strategies. It is both easy to copy and to erase electronic files. A simple solution to keeping track of multiple versions of our file on various media is to name each saved file with the date and place that it is stored.