Which type sits at the top of the EBP hierarchy?

Which type sits at the top of the EBP hierarchy?

• A. Foundational sciences
• B. Systematic reviews & meta-analyses of RCTs
• C. Case series
• D. Expert opinion

Answer: (B)

Systematic reviews and meta-analyses of randomized controlled trials sit at the top because they synthesize the best available evidence in a rigorous, transparent way. By using predefined search strategies, applying consistent criteria to select studies, critically appraising their quality, and, when appropriate, statistically combining results, they increase precision and assess consistency across multiple trials. This approach reduces the influence of any single study’s limitations and provides a more reliable estimate of an intervention’s effect. Lower parts of the hierarchy, like foundational sciences, case series, and expert opinion, lack that rigorous synthesis and are more prone to bias or limited applicability to clinical outcomes.

Systematic reviews and meta-analyses of randomized controlled trials sit at the top because they synthesize the best available evidence in a rigorous, transparent way. By using predefined search strategies, applying consistent criteria to select studies, critically appraising their quality, and, when appropriate, statistically combining results, they increase precision and assess consistency across multiple trials. This approach reduces the influence of any single study’s limitations and provides a more reliable estimate of an intervention’s effect. Lower parts of the hierarchy, like foundational sciences, case series, and expert opinion, lack that rigorous synthesis and are more prone to bias or limited applicability to clinical outcomes.