Which description best fits a systematic review?

Which description best fits a systematic review?

• A. Focused question, rigorous search, and extensive critical analysis
• B. Narrative summary without methods
• C. Single randomized trial
• D. Meta-analysis only without review

Answer: (A)

A systematic review is defined by a focused, predefined question, a rigorous and transparent search strategy, and a thorough, systematic critical appraisal and synthesis of the included studies. This combination ensures that the review is as unbiased and reproducible as possible, with methods clearly described so other researchers can replicate the process. The focused question sets the scope and criteria in advance, often using a framework like PICO, so the review searches for precisely what is relevant and reduces drift as new studies are found. A rigorous search means searching multiple databases and sources with a well-documented search strategy, including inclusion and exclusion criteria, to try to capture all pertinent evidence and minimize selection bias. Extensive critical analysis involves assessing the quality and risk of bias of each study, extracting data consistently, and synthesizing findings in a transparent way, which may include a meta-analysis but remains anchored to a systematic appraisal. This aligns with why the preferred description fits a systematic review: a narrative summary without explicit methods lacks transparency and reproducibility; a single randomized trial is not a review; and a meta-analysis done in isolation without the surrounding systematic search and study appraisal does not constitute a full systematic review.

A systematic review is defined by a focused, predefined question, a rigorous and transparent search strategy, and a thorough, systematic critical appraisal and synthesis of the included studies. This combination ensures that the review is as unbiased and reproducible as possible, with methods clearly described so other researchers can replicate the process.

The focused question sets the scope and criteria in advance, often using a framework like PICO, so the review searches for precisely what is relevant and reduces drift as new studies are found. A rigorous search means searching multiple databases and sources with a well-documented search strategy, including inclusion and exclusion criteria, to try to capture all pertinent evidence and minimize selection bias. Extensive critical analysis involves assessing the quality and risk of bias of each study, extracting data consistently, and synthesizing findings in a transparent way, which may include a meta-analysis but remains anchored to a systematic appraisal.

This aligns with why the preferred description fits a systematic review: a narrative summary without explicit methods lacks transparency and reproducibility; a single randomized trial is not a review; and a meta-analysis done in isolation without the surrounding systematic search and study appraisal does not constitute a full systematic review.