Relative risk reduction (RRR) differs from absolute risk reduction (ARR) because:

A They are identical

B RRR expresses the proportional reduction in risk while ARR gives the actual difference in event rates

C RRR is always larger

D ARR is a percentage

✓ Correct Answer: Option B

RRR = ARR/CER (control event rate). Can overstate clinical significance — a 50% RRR sounds impressive but if baseline risk is 2%, ARR is only 1% (NNT=100). Always consider both.

💡 Why is B) the correct answer?

The correct answer to the question "Relative risk reduction (RRR) differs from absolute risk reduction (ARR) because:" is Option B: RRR expresses the proportional reduction in risk while ARR gives the actual difference in event rates.

The other options — A) They are identical, C) RRR is always larger, D) ARR is a percentage — are incorrect for this USMLE Exam Prep question. As explained above: RRR = ARR/CER (control event rate). Can overstate clinical significance — a 50% RRR sounds impressive but if baseline risk is 2%, ARR is only 1% (NNT=100). Always consider both.

📚 About This USMLE Exam Prep Practice Question

This 3-level USMLE Exam Prep question from the Step 3 - Clinical Practice topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free USMLE Exam Prep practice test or use flashcards for spaced repetition review.

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Relative risk reduction (RRR) differs from absolute risk reduction (ARR) because:

✓ Correct Answer: Option B

📚 About This USMLE Exam Prep Practice Question

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