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.

What is the formula for calculating sensitivity?

D/(B+D) x 100
A/(A+B) x 100
A/(A+C) x 100
B/(A+B) x 100

The correct answer is: A/(A+C) x 100

Sensitivity is calculated using the formula: true positive (A) divided by the sum of true positive (A) and false negative (C), multiplied by 100 to express it as a percentage. This formula helps in determining the proportion of actual positives that are correctly identified by the test. Therefore, the correct formula for calculating sensitivity is A/(A+C) x 100. Choice A, D/(B+D) x 100, is not the correct formula for sensitivity. It involves calculating the true positive rate divided by the sum of false positive and true positive, which is not the correct way to calculate sensitivity. Choice B, A/(A+B) x 100, is not the correct formula for sensitivity. It involves calculating the true positive rate divided by the sum of true positive and false positive, which is not the correct way to calculate sensitivity. Choice D, B/(A+B) x 100, is not the correct formula for sensitivity. It involves calculating the false negative rate divided by the sum of true positive and false positive, which is not the correct way to calculate sensitivity.