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How should we write up the statistical results of meta-analyses in the text and abstract of a Cochrane systematic review?

Topic category Knowledge translation and communicating evidence
Date and Location
Fecha: 
Viernes 21 Octubre 2011 - 16:00 - 17:30
Location: 
Methods Group
Methods Group: 
None
Contact person
Contact person: 
Elaine Beller (Contact this person)
Sally Hopewell (Contact this person)
Facilitators
NombreApellidoAffiliation and Country
Nombre: 
Elaine
Apellido: 
Beller
Affiliation and Country: 
Bond University, Australia
Nombre: 
Sally
Apellido: 
Hopewell
Affiliation and Country: 
UK Cochrane Centre, UK
Other contributors
NombreApellidoAffiliation and Country
Nombre: 
Kate
Apellido: 
Cahill
Affiliation and Country: 
Tobacco Addiction Review Group
Nombre: 
Paul
Apellido: 
Glasziou
Affiliation and Country: 
Bond University, Australia
Target audience
Target audience: 
review authors, managing editors, coordinating editors
Is your workshop restricted to a specific audience or open to all Colloquium participants?: 
Open
Level of knowledge required: 
Intermediate
Type of workshop
Type of workshop: 
Training
Abstract text
Abstract: 
Objectives:To give participants confidence and practical skills in taking a statistical result and ensuring the non-statistical reader understands the meaning.

Description: When we obtain the numerical result of a meta-analysis, we end up with an estimated effect size, measure of precision (confidence interval) and a P-value. How do we take those statistical results, and convey them in words in the text or the abstract of A Cochrane review, so that readers will understand what they mean? This workshop will take examples of statistically significant and non-significant results, using the common effect size measures such as odds ratio, risk ratio, mean difference and standardised mean difference, and guide participants through translating those results into meaningful text, hopefully without imparting ‘spin’ on the results! We will begin with the easier cases, such as when the result is highly significant, and easy to explain, and work our way to the more difficult cases, such as when the result is ‘almost significant’, or has a wide confidence interval, or uses standardised mean difference. The talks will be brief, and the emphasis will be on participation in the writing tasks. All examples are taken from recent systematic reviews in the Cochrane and non-Cochrane literature.