To decide the type of studies to be included and excluded in meta-analysis is highly dependent on the question that is asked.Ĭarrying out a meta-analysis does not always have to be sensible even if you decide to carry out one. On the other hand if you opt for a synthesis by considering the interventions and populations which are not similar. One cannot combine the above different data one meta-analysis. For instance carrying out a systematic review on the outcomes of listening to music during studies on the exam performance of students and the data collected for one study is for classical music, for two it is on pop music and it includes both teenagers and children respectively, the other one can be related to death metal and the later on 80’s classics. Meta-analysis might prove to be a bad choice when the answer to the review question is better with qualitative data.Ĭarrying out a meta-analysis would be a bad decision if the nature of your studies is too different to cumulate. Systematic reviews will most of the times, not necessarily, always include a meta-analysis of data in the form of numeric values that is collected from the studies. The answer to why a systematic review would not include a meta-analysis. Systematic reviews are more clear and detailed. Although, there are advantages associated with the process it is often very time consuming. One can observe from the above points that a systematic review includes more rather than just putting down numbers. Updating: The review should be updated when fresh evidence is received.This is one major step during which meta-analysis might or might not play role. Synthesis: The evidence should be synthesized.Quality appraising of the stud: This proves very important to determine the quality of study that is found.Analyze you results: Analyzing the search outcomes or results and comparing them with your prescribed selection or exclusion criteria that helps to determine the studies that need to be included.Search the literature: Carrying out an in-depth search of the literature associated with your study is also very essential.Formation of a protocol: Proper specification and publishing of the suggested methodology helps form a proper protocol.They are ideally expected to register their preferred review label with Campbell or any identical form. Definition of the question: A researcher should always define their question.Following are the stages in conducting a review Every author or researcher is required to cohere to the given standards of reporting and conducting (META-EVIDENCE BLOG, 2018). Reviews that are usually registered with organizations like Cochrane and Campbell are highly reliable. The highlighting point about systematic reviews is that they opt to reduce bias at all steps of the reviewing process. Difference between systematic review and meta-analysis A meta-analysis should be carried out in the manner of a systematic review.įig 3. A following difference will help understand more.ĭefinition of a systematic review: A systematic review is an in-detail, clear and systematic way of collecting, evaluating and synthesis of evidence that will answer your question of study.ĭefinition of meta-analysis: Meta-analysis is a statistical approach or procedure for accumulating data in the form of values or numerical from different studies. Even though there is a considerable similarity of features between meta-analysis and systematic reviews the two are not same. They can also be used alternative to each other. One common misinterpretation about meta-analysis and systematic reviews is that both the terms are same.
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