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[Core] Investigating and Dealing with Bias in Cochrane Systematic Reviews

Date and Location

Session: 

W4.04

Date: 

Monday 23 September 2013 - 13:30 - 15:00
Methods Group and core training

Methods Group

Bias Methods Group
Contact persons and facilitators

Contact person

Lucy Turner

Facilitators

Isabelle Boutron
Other contributors
First nameLast nameAffiliation and Country

First name

Jonathan

Last name

Sterne

Affiliation and Country

University of Bristol, England

First name

David

Last name

Moher

Affiliation and Country

Ottawa Hospital Research Institute, Canada

First name

Lucy

Last name

Turner

Affiliation and Country

Ottawa Hospital Research Institute, Canada

First name

Asbjørn

Last name

Hróbjartsson

Affiliation and Country

Nordic Cochrane Centre, Denmark

First name

Douglas G

Last name

Altman

Affiliation and Country

University of Oxford, England

First name

Julian

Last name

Higgins

Affiliation and Country

University of Bristol, England
Target audience

Target audience

Review Authors and Editors

Is your workshop restricted to a specific audience or open to all Colloquium participants?

Open

Level of knowledge required

Basic
Type of workshop

Type of workshop

Training
Abstract text

Abstract

Objectives: To introduce the different forms of bias that can affect systematic review results, and the methods that can be used to detect and address these biases Description: The results of a systematic review can be distorted if bias has been introduced into the review process at any stage (e.g. biased location and selection of included studies, high risk of bias in the results of included studies). Accordingly, investigation of the presence, degree, and nature of bias is mandatory and is as a routine part of the systematic review process. The Bias Methods Group draws together researchers interested in this field, and the Cochrane Handbook contains chapters on 'Assessing risk of bias in included studies' and 'Addressing reporting biases'. The workshop will largely draw upon the work of members of this Group, of which the facilitators are the co-Convenors. We will discuss potential biases that might be introduced into reviews, with an emphasis on the effects of flaws in the methodology of component studies. We will discuss how review authors should incorporate risk of bias assessments in meta-analyses. The workshop will consist of presentation, discussion and worked examples with and among participants and in small groups.