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A Guide to Systematic Reviews

Article Screening


The purpose of article screening to remove studies that are clearly not related to your topic. Use your inclusion/exclusion criteria to first screen the title and abstracts of your studies and determine whether they are relevant to your research question. Once titles and abstracts have been screened, the full text must be retrieved and screened to definitely decide whether the study fits the eligibility criteria of your review.

It is highly recommended that two independent reviewers screen all studies, resolving areas of disagreement by consensus or by a third party who is an expert in the field. Listed below are tools that can be used for article screening.

Covidence is an online systematic review management tool that allows for independent title/abstract screening, full text screening, data extraction and risk of bias assessment. Cornell University Library has an unlimited license to Covidence for members of the Cornell community located on the main campus in Ithaca, NY through December 2019. 

Exporting Citations from EndNote to Covidence

1. In Endnote, select all citations you wish to export, and then select "File" and "Export" 

2. Under "Save as type" select "text file (*.txt)" and under Output style select "RefMan (RIS) Export"

3. Save the file to your desktop

4. In Covidence, click "Import Studies" and select your RIS file. Click "Import" 

More information about Covidence.

Note: Covidence only accepts RIS and Endnote or PubMed XML format

Rayyan is a free online tool that can be used for independent screening and coding of studies in a systematic review. Rayyan will pre-populate inclusion and exclusion criteria, but you can customize these criteria. It also uses tagging and filtering to code and organize references.  Title and abstract screening can be conducted in one project, while full text screening can be conducted in a second project.

Access Rayyan here.

Exporting Citations from Databases into Rayyan:

  • For systematic reviews, it is recommended to export all of your results into a citation manager, de-duplicating your results, and then exporting from your citation manager in RIS format.

  • RIS files from Ovid, EBSCO, or Scopus do not successfully import directly into Rayyan.
    • Export your results to a citation manager first and then export from your citation manager in RIS format.
  • Web of Science RIS files successfully import directly into Rayyan.
  • PubMed XML files successfully import Rayyan.

Excel is the most basic tool for the management of article screening. Lists of references can be exported from citation managers into Excel format for screening. A more advanced approach to using Excel for this purpose is the PIECES approach, designed by a librarian at Texas A&M. The PIECES workbook is downloadable at this guide.

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