Systematic Review Methodology
Learn systematic review methodology — the gold standard for synthesizing research evidence on a question.
A systematic review is the most rigorous method for synthesizing research evidence. Understanding its methodology helps you both conduct better research and evaluate systematic reviews critically.
What Is a Systematic Review?
A systematic review uses explicit, reproducible methods to identify, select, and critically appraise all relevant research on a specific question. Unlike a narrative review (which selects studies based on the author's judgment), a systematic review follows a pre-specified protocol to minimize bias.
Steps in a Systematic Review
- Formulate a specific research question (PICO framework)
- Develop a search strategy and register the protocol
- Search multiple databases systematically
- Screen results against inclusion/exclusion criteria
- Extract data from included studies
- Assess risk of bias in each study
- Synthesize findings (narrative or meta-analysis)
- Report findings following PRISMA guidelines
Systematic reviews are the gold standard, but they are not immune to bias. Publication bias (only positive results are published) can distort meta-analyses. Cochrane Reviews are considered the most rigorous because of their strict methodology.
PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) is a checklist for reporting systematic reviews. When evaluating a systematic review, check whether it follows PRISMA guidelines — this indicates methodological rigor.
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3 questions · Grade 11 level