Biostatistics & Research · single question
Which is the FUNDAMENTAL requirement that defines a randomized controlled trial?
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Correct answer: A. Random allocation of participants to groups
- A. Correct. RANDOM allocation to comparison groups is the defining feature, minimizing selection bias and balancing confounders.
- B. Incorrect. Blinding strengthens an RCT but is not what defines it (some RCTs are open-label).
- C. Incorrect. Crossover is one optional RCT variant, not a defining requirement.
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