What is the minimum number of studies for a systematic review?

Question

There is no minimum number of studies to be included in systematic review, but if one wish to do meta-analysis, at least two studies are required to sum-up the data and synthesis the evidences that will add some new evidence and knowledge in current knowledge.

How many papers do you need for a systematic literature review?

All Answers (15) While there is definitely no minimum/maximum number of studies for a systematic review as explained by Farah and many others in a prior posting, it is essential to make sure that the design of the review is not too restrictive as well.

What is a good sample size for a systematic review?

When assessing whether sample sizes were adequate, the majority of studies (90-98%) were well powered to detect large effect sizes (2.0 SD) for one mean. However, few studies were adequately powered to detect smaller (and arguably more realistic) effect sizes (0.2-1.0 SD).

How many studies should be in a literature review?

In general, undergraduate students will usually be required to use somewhere between 5 and 20 sources; graduate students typically will need between 20 and 40. However, the number can vary greatly, so always read your requirements and ask your professor.

How many results does a systematic review have?

There is no such limit. In a systematic review, you are supposed to find ALL studies that meet the study eligibility criteria for your research question. For example, we are currently evaluating 5173 search hits in a systematic review.

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