In a trial, the event occurred in 30% of the control group and in 20% of the treated group. What is the number needed to treat (NNT)?
Answer and explanation
Correct answer: D. 10
- Step 1: The absolute risk reduction is 30% - 20% = 10%, or 0.10.
- Step 2: NNT = 1 / ARR = 1 / 0.10 = 10.
Answer
10.
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