How many databases should you search?

Which databases should I search?

Optimal searches in systematic reviews should search at least Embase, MEDLINE, Web of Science, and Google Scholar as a minimum requirement to guarantee adequate and efficient coverage.

Why is it important to search multiple databases?

Prior studies [3–5] have demonstrated that a single search engine does not capture all of the pertinent and available articles, and using two or more databases provides greater coverage of all possible citations.

Is it possible to search multiple databases at once?

Step 1: Open Academic Search Ultimate from the library's home page. Step 2: Select the "Choose Databases" option. Step 3: Identify which databases you want to include in your search. Check the boxes next to the databases and then choose OK.

How many sources should a systematic review have?

Basically, there is no limit on number of studies for a systematic review. For a meta-analysis, you can practically do it with 2 or more. However, generally speaking, a MA of less than 4 or 5 studies of controversial benefit.