A randomized trial of a smoking cessation intervention reports 12-month abstinence in 24% of the intervention group and 16% of usual care. Adverse

Question

A randomized trial of a smoking cessation intervention reports 12-month abstinence in 24% of the intervention group and 16% of usual care. Adverse events are similar. A clinician wants the practical effect size. Which of the following is the most likely explanation for this patient's findings?

Accepted Answer

The number needed to treat is 13

Answer

The absolute risk reduction is 40%

Answer

The intervention is harmful

Answer

The relative risk reduction is 8%

Answer

The number needed to treat is 2

NNT — USMLE Step 3 MCQ

A randomized trial of a smoking cessation intervention reports 12-month abstinence in 24% of the intervention group and 16% of usual care. Adverse events are similar. A clinician wants the practical effect size. Which of the following is the most likely explanation for this patient's findings?