Systematic review methodology, meta-analysis pooling, forest plots, and heterogeneity concepts, one concept per card.
35 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a systematic review?
- A structured, comprehensive synthesis of all available evidence on a specific research question, following a predefined and reproducible search and selection methodology
- How does a systematic review differ from a traditional narrative review?
- A systematic review uses explicit, reproducible methods for searching, selecting, and appraising studies, reducing the risk of selective or biased inclusion compared to a narrative review
- What is a meta-analysis?
- A statistical technique that combines quantitative results from multiple independent studies addressing the same question to produce a single pooled estimate
- What is the relationship between a systematic review and a meta-analysis?
- A meta-analysis is a statistical method that can be performed within a systematic review, but not every systematic review includes a meta-analysis
- What reporting guideline is widely used to standardize the reporting of systematic reviews and meta-analyses?
- PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses)
- What is a protocol registration (such as PROSPERO) used for in systematic review methodology?
- Publicly documenting the planned methods and objectives of a systematic review in advance, reducing the risk of post hoc changes to the analysis plan
- What is publication bias in the context of meta-analysis?
- The tendency for studies with statistically significant or positive results to be more likely published than studies with null or negative results, which can skew a pooled estimate
- What graphical tool is commonly used to visually assess publication bias in a meta-analysis?
- A funnel plot
- What pattern in a funnel plot suggests the presence of publication bias?
- Asymmetry, such as a gap in the region of small studies with null or negative results
- What statistical test is commonly used to formally test for funnel plot asymmetry?
- Egger's test
- What is a forest plot?
- A graphical display showing the individual effect estimates and confidence intervals of each included study, along with the pooled overall estimate
- On a forest plot, what does the size of the box representing each individual study typically indicate?
- The relative weight (often related to sample size or precision) given to that study in the pooled analysis
- On a forest plot, what does the diamond shape typically represent?
- The pooled (overall combined) effect estimate and its confidence interval
- What does it mean if a forest plot's overall diamond crosses the line of no effect?
- The pooled effect estimate is not statistically significant at the chosen confidence level
- What is heterogeneity in the context of meta-analysis?
- Variability in the true effect sizes across the different studies being combined, beyond what would be expected from chance alone
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