Meta-analysis combines the findings of multiple studies to determine the strength of evidence for a specific research finding.
A meta-analysis is a quantitative, formal, epidemiological study design that is used to systematically assess previous research studies in order to draw conclusions about that body of work. A meta-results analysis's may include a more precise estimate of the effect of a treatment or risk factor for disease, or other outcomes, than any individual study that contributed to the pooled analysis. A critical outcome is the examination of variability or heterogeneity in study results. The advantages of meta-analysis include a consolidated and quantitative review of a large, often complex, and at times seemingly contradictory body of literature.The specification of the outcome and hypotheses that are tested, as well as a sensitive literature search, are critical to the conduct of meta-analyses.
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