Number Needed to Treat — NDEB AFK MCQ
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Correct answer: E — The number of patients who need to be treated with a new therapy for one additional patient to benefit compared to the control treatment
The number needed to treat (NNT) is a measure of clinical effectiveness calculated as 1/ARR (absolute risk reduction). It represents the number of patients who need to receive a treatment for one additional patient to benefit (experience a positive outcome) compared to the control group. A lower NNT indicates greater treatment effectiveness. For example, if an NNT = 10, treating 10 patients with the intervention produces one additional positive outcome compared to the control.
Reference: Sackett DL – Evidence-Based Medicine, 1996