Systematic reviews – Systematic reviews are best for answering single questions (eg, the effectiveness of tight glucose control on microvascular complications of diabetes). They are more scientifically structured than traditional reviews, being explicit about how the authors attempted to find all relevant articles, judge the scientific quality of each study, and weigh evidence from multiple studies with conflicting results. These reviews pay particular attention to including all strong research, whether or not it has been published, to avoid publication bias (positive studies are preferentially published).
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Meta-analysis -- Meta-analysis, which is commonly included in systematic reviews, is a statistical method that quantitatively combines the results from different studies. It can be used to provide an overall estimate of the net benefit or harm of an intervention, even when these effects may not have been apparent in the individual studies [9]. Meta-analysis can also provide an overall quantitative estimate of other parameters such as diagnostic accuracy, incidence, or prevalence.
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This first video goes over the basics of what steps are involved in a systematic review in 3 minutes.
This next video addressed the steps of a systematic review with more detail and questions to ask yourself. Additionally, it covers the PICO question format that is generally used in the Nursing and Medical fields. I do find that the PICO question can help you narrow down your topic question if you're finding that it is too broad.
Here is an hour-long tutorial from another library on how to search for literature in order to complete a systematic review. The slides are available in the video description (click open in Youtube on the video) as are chapters that allow you to skip to specific parts of the lecture.
Additionally, click on the Searching Basics tab on the left to get additional details for conducting your literature search.