Which of the following is the MOST appropriate measure to quantify the precision of an estimate in a clinical trial?
- A P-value
- B 95% confidence interval ✓
- C Standard deviation of the sample
- D Relative risk
Correct answer: B. 95% confidence interval
Explanation
The 95% confidence interval quantifies the precision of an estimate by providing the range within which the true population parameter is likely to lie with 95% confidence; a narrow CI indicates high precision. The p-value only indicates statistical significance and does not convey the direction or magnitude of effect. Standard deviation describes variability in the sample, not the precision of the estimate. Relative risk is a measure of association, not precision.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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