AM VaultPractice questions › Population health and ethics › Sensitivity, specificity and predictive values
Sensitivity, specificity and predictive values
A practice question in the style of the AMC Part 1 MCQ exam. Choose your answer to see the explanation.
A patient's pre-test probability is 10%. A positive test has an LR+ of 16. What is the post-test probability?
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The answer is D: 64%.
Pre-test odds 1/9 x 16 = 1.78; probability = 1.78 / 2.78, about 64%.
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