Narrative reviews: Broad perspective on topic (like a textbook chapter), no specified search strategy, significant bias issues, may not evaluate quality of evidence. It will include focus groups, interviews, observations and diaries.
ExampleĪ systematic review can be either quantitative or qualitative.Ī quantitative systematic review will include studies that have numerical data.Ī qualitative systematic review derives data from observation, interviews, or verbal interactions and focuses on the meanings and interpretations of the participants.
Meta-analysis – A quantitative systematic review that applies statistical analysis.Based on other types of clinical studies or literature – Best available evidence.Based on randomized controlled clinical trials (RCTs) – Best evidence.
These definitions are sourced from a variety of methodology papers and guidelines found throughout this Guide.Systematic reviews: Comprehensive with minimized bias, based on specific question and criteria with a pre-planned protocol, evaluates quality of evidence. Umbrella reviews use explicit and systematic methods to search for, identify, extract data from, and analyse the results of multiple systematic reviews on related research questions. (aka 'overview of reviews', 'overview', 'review of reviews', 'meta-review') Researchers conducting systematic reviews use explicit and reproducible methods aimed at minimising bias in the review process, in order to produce more reliable findings that can be used to inform decision making. (2021) p.80.Īttempts to identify, appraise and synthesise all the empirical evidence that meets pre-specified eligibility criteria to answer a given research question. 'A rapid review is a form of knowledge synthesis that accelerates the process of conducting a traditional systematic review through streamlining or omitting a variety of methods to produce evidence in a resource-efficient manner.' Hamel et al. Conducted according to similar rigorous and transparent methods as systematic reviews, but typically answers broad questions and generally does not require critical appraisal. They can provide an historical overview of a field of research, show emerging trends, identify knowledge gaps, and/or contextualise a research project within the broader scholarly conversation.Īims to provide an overview or map of the available evidence, focusing on a particular topic, field, concept, or issue. Literature reviews examine existing knowledge on a specified topic. Rigorous critical appraisal, and evaluation of study quality.Ĭlear summaries of studies based on high quality evidence. before the review is conducted.Ĭriterion-based selection that is uniformly applied, clear and explicit. Comprehensive sources and explicit and reproducible search strategy.Įligibility criteria is clearly defined at the outset i.e. To address a clearly focused review question by finding the best available, relevant research studies and synthesising the results.Ī peer review protocol or plan is included. What are the different elements of a systematic review? What is it?Ī systematic review attempts to identify, appraise and synthesise all the empirical evidence that meets pre-specified eligibility criteria to answer a given research question.
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