Analysing dichotomous outcomes


To analyse the results of the studies included in your systematic review, you will need to understand the different kinds of data you may encounter. The slidecast presentation is an introduction to analysing dichotomous or binary data.

The presentation has been translated into several languages other than English. Select an available language from the list at the top right of this page.

After using this resource, you should be able to...
  • Differentiate the concepts of risk and odds for dichotomous outcomes
  • Calculate effect measures (risk ratio, odds ratio, risk difference) for dichotomous outcomes from a 2x2 table
  • Interpret the calculated effect measures and express them in words
  • Identify the data needed for analysing dichotomous outcomes

Analysing dichotomous outcomes - slidecast

Author information: 
Cumpston, Miranda

Approved by the Cochrane Methods Board on 23 September 2011.

Compiled by Miranda Cumpston, based on materials by Sally Hopewell, Phil Alderson, Jon Deeks, Deborah Caldwell, the Cochrane Statistical Methods Group and the Australasian Cochrane Centre.