NOTE: Logging in to the following databases through the Health Sciences Library Databases ensures you have access to the full text of articles, when available.
Some systematic review topics will be covered by subject specific databases.
Freely available databases such as AGRICOLA (agriculture, including animal sciences, human nutrition, environmental sciences and more); Basic Medical Sciences Databases; ERIC (education); PEDro (physiotherapy) and others may be appropriate depending on your topic. A database not available to affiliates of New York Medical College can be searched by a librarian through Dialog for associated fees.
In your protocol you have already established the eligibility criteria for inclusion. In other words, what does the study need to look like in order to answer your research question? What is the population? Age? Time frame? Problem? Intervention?
Since you have cast a wide net and completed a rigorous search, you have many studies from which to choose. You will now use this criteria for screening and selecting.
Remember, screening and selection requires two or more reviewers to work independently from one another. This reduces any chance of bias.
Here are two tools that may help in this process:
Covidence is a web based tool that streamlines your ability to screen, select, as well as extract the data from the selected studies for your systematic review. Outside of the free trial. Covidence is fee based.
Rayyan is similar to Covidence but less costly. It too is a web-tool that dramatically speeds up the process of sorting, screening and selecting studies. Unlike Covidence it is free, but also unlike Covidence, Rayyan does not go beyond the selection process to the data extraction phase.