Cochrane loved to study patterns of disease and how these related to the environment. Д®pidemiologist Archie Cochrane played a vital role in formulating the methodology of the systematic review. The unsystematic narrative review is more likely to include only research selected by the authors, which introduces bias and, therefore, frequently lags behind and contradicts the available evidence. Systematic reviews, as well as the meta-analyses of the appropriate studies, can be the best form of evidence available to clinicians. Such reviews emerged in the 1970s in the field of social sciences. A systematic review provides an unbiased assessment of these studies. Systematic reviews, according to Wright, et al., are defined as a вЂњreview of the evidence on a clearly formulated question that uses systematic and explicit methods to identify, select and critically appraise relevant primary research, and to extract and analyze data from the studies that are included in the reviewвЂќ. Our topic of interest in this article is to understand the different steps of conducting a systematic review. A literature review may be argumentative, integrative, historical, methodological, systematic, or theoretical, and these approaches may be adopted depending upon the types of analysis in a particular study.

It compiles published research on a topic, surveys different sources of research, and critically examines these sources. A literature review provides an important insight into a particular scholarly topic.

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