Remember that evidence synthesis reviews are studies of studies. The research team has a question in mind for which they want to pull many studies on the topic and use those studies' data to come to a conclusion. So after the screening rounds have been completed, the next step is to pull the specific data points from the studies marked for inclusion.
In the context of evidence synthesis projects like systematic reviews, the data extraction process must be systematized. The a priori protocol should address the data extraction process, including the workflow, what data will be collected, how it will be analyzed or synthesized, and what will happen if a study is missing data. Additionally, a draft of your data extraction form should be included in your a priori protocol.
As with screening tools, there are many excellent options for tools designed to help with the data extraction process of an evidence synthesis project. In fact, some subscription-based screening tools, like Covidence and DistillerSR, include data extraction functions. The SJSU Library does not currently provide access to any subscription-based screening tools. Instead, we recommend the following options.
You can use spreadsheets, such as MS Excel or Google Sheets, or database software, such as MS Access or Airtable, to create customizable data collection instruments for an evidence synthesis project.
You could also use an online form generator, such as Google Forms, or survey software, such as Qualtrics or Survey Monkey, to create customizable data collection instruments for your evidence synthesis project. SJSU affiliates can access Qualtrics via SJSU eCampus and RedCap via One.SJSU.
There seems to be a dwindling number of free tools online for only the data extraction part of evidence synthesis reviews. But if that's your preference, consider the following:
Which tool you choose depends on a number of factors, such as cost, suitability to team workflows, ease of use, etc. Check out Section 5.4.2 Considerations In Selecting Data Collection Tools of the Cochrane Handbook for additional guidance.