Which of the following is an example of a systematic review?
A) An RCT study published in the journal Nursing Research
B) A meta-analysis from the Cochrane database
C) A synopsis published in Evidence-Based Nursing
D) A clinical practice guideline from the National Guideline Clearinghouse
B
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A meta-analysis is a type of systematic review and a technique for integrating quantitative research findings statistically. In essence, meta-analysis treats the findings from a study as one piece of information. The findings from multiple studies on the same topic are combined and then all of the information is analyzed statistically in a manner similar to that in a usual study. Unlike systematic reviews, clinical practice guidelines (which often are based on systematic reviews) give specific recommendations for evidence-based decision-making. Guideline development typically involves the consensus of a group of researchers, experts, and clinicians. A randomized controlled trial (RCT) is an individual study that focuses on the effectiveness of therapies rather than on broader health-care interventions. Synopses, or summaries, of systematic reviews and of single studies are available in evidence-based abstract journals such as Evidence-Based Nursing.
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