Biostatistics & Research · single question
Which study design provides the HIGHEST level of evidence for a clinical question?
Show answer and explanation
Correct answer: A. Systematic review / meta-analysis of randomized controlled trials
- A. Correct. A systematic review/meta-analysis of RCTs sits at the top of the evidence pyramid, synthesizing the best available controlled data.
- B. A single cohort study is observational and ranks below systematic reviews/RCTs.
- C. A case-control study is observational and lower in the hierarchy.
- D. Expert opinion/case reports are the lowest level of evidence.
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