NAPLEX (North American Pharmacist Licensure Examination) Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Ace your North American Pharmacist Licensure Examination (NAPLEX) with our comprehensive practice test. Features include interactive flashcards, multiple-choice questions, with detailed hints and explanations. Fast-track your pharmacy career today!

Practice this question and more.

How is the Relative Risk Reduction (RRR) calculated?

(% risk in control group - % risk in treatment group) / % risk in control group
% risk in control group - % risk in treatment group
1 / Absolute Risk Reduction (ARR)
(cost new - cost old)/(effect new - effect old)

The correct answer is: (% risk in control group - % risk in treatment group) / % risk in control group

The RRR is a measure used to determine the difference in risk between two groups, the control group and the treatment group. The RRR is calculated by taking the difference between the percentage risk in the control group and the percentage risk in the treatment group, and dividing it by the percentage risk in the control group. Option B is incorrect because it only subtracts the two percentages without taking into account their relative values. Option C is incorrect because it is describing how to calculate the Number Needed to Treat (NNT), not the RRR. The NNT is the inverse of the ARR, not the RRR. Option D is incorrect because it is describing a cost-effectiveness ratio formula, not the RRR. This formula is used to calculate the cost-effectiveness of a new treatment compared to an older one. The RRR does not involve cost or effectiveness measures.