Biostatistics & Research · single question
Which type of study systematically combines data from multiple independent studies to produce a single summary estimate?
Show answer and explanation
Correct answer: A. Meta-analysis
A meta-analysis combines quantitative results from multiple studies addressing the same question, producing a more precise overall estimate.
- A. ✅ CORRECT – Meta-analysis synthesizes data from multiple studies, sitting at the top of evidence hierarchy.
- B. ❌ RCT is a single interventional study.
- C. ❌ Case-control compares exposures between disease/no-disease groups.
- D. ❌ Cross-sectional study measures prevalence at one time point.
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