Chapter 2. Synthesising the Evidence

  1. Richard Wormald1,
  2. Liam Smeeth2,
  3. Katherine Henshaw3 and
  4. Anupa Shah4
  1. Jennifer Evans

Published Online: 15 APR 2008

DOI: 10.1002/9780470698709.ch2

Evidence-based Ophthalmology

Evidence-based Ophthalmology

How to Cite

Evans, J. (2005) Synthesising the Evidence, in Evidence-based Ophthalmology (eds R. Wormald, L. Smeeth, K. Henshaw and A. Shah), BMJ Publishing Group, London, UK. doi: 10.1002/9780470698709.ch2

Editor Information

  1. 1

    Consultant Ophthalmologist, Moorfields Eye Hospital, Honorary Senior Lecturer, London School of Hygiene and Tropical Medicine and Coordinating Editor, Cochrane Eyes and Vision, Group, London, UK

  2. 2

    Senior Lecturer in Clinical Epidemiology, London School of Hygiene and Tropical Medicine, General Practitioner, London and Editor, Cochrane Eyes and Vision Group, London, UK

  3. 3

    Review Group Coordinator, Cochrane Eyes and Vision Group, London, UK

  4. 4

    Trial Search Coordinator, Cochrane Eyes and Vision Group, London, UK

Publication History

  1. Published Online: 15 APR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9780727914439

Online ISBN: 9780470698709

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Keywords:

  • graphical presentation;
  • evidence;
  • data extraction;
  • summary statistics;
  • meta-analysis

Summary

This chapter contains section titled:

  • Systematic reviews avoid, bias and improve precision

  • Steps involved in doing a systematic review

  • Location and appraisal of relevant studies

  • Data extraction

  • Individual patient data

  • Ways of presenting data

  • Graphical presentation

  • When not to combine data from different studies

  • Interpreting data that has not been combined

  • Fixed effect versus random, models for combining data

  • Sensitivity analyses

  • Subgroup analyses

  • Statistical issues relating to eyes

  • Summary

  • References