NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

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What does RR=1 (or 100%) imply in relative risk calculation?

  1. No difference in risk

  2. Greater risk in treatment group

  3. Lower risk in treatment group

  4. Greater risk in control group

The correct answer is: No difference in risk

When RR=1 (or 100%), it means that there is no difference in risk between the treatment group and control group. This suggests that the treatment being studied is not associated with an increased or decreased risk of the outcome being measured. Therefore, options B, C, and D are all incorrect as they suggest a difference in risk between the treatment and control group.

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