This module will discuss how you decide which of the studies your searching found should be included in the review. We will look at ways you can do this as reliably as possible and with the minimum of bias.

Learning objectives

• Understand that selecting studies is a multi-stage process
• Be able to design an eligibility form
• Be aware of the need to pilot inclusion criteria
• Be aware of ways to improve the reliability of study selection
• Be aware of the existence of duplicate publications
• Be aware of ways to obtain sufficient information to make a reliable decision on study eligibility

Relevant sections of the Reviewers' Handbook

• Section 5.7

Other relevant material

• BMJ paper by Martin Tramèr and colleagues (Tramèr MR et al BMJ 1997;315:635-640)

Where does this go in a Cochrane review?

• Early on in the Methods section of protocol and review