In a trial, the event occurred in 12% of the control group and in 8% of the treated group. What is the number needed to treat (NNT)?
Answer and explanation
Correct answer: C. 25
- Step 1: The absolute risk reduction is 12% - 8% = 4%, or 0.04.
- Step 2: NNT = 1 / ARR = 1 / 0.04 = 25.
Answer
25.
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