How to Break Down a Question | USMLE Step 1 | Biostatistics

How to break down a USMLE Step 1 question, from MedSmarter with Dr. Jason Colip.

The attached video is the breakdown of another question regarding Biostatistics.

A new nasal swab test was recently developed to detect antibodies to SARS-CoV-2 in order to diagnose the infection. One thousand patients received the test, and while 100 people had the infection, only 80 of them tested positive. Of the 900 people who did not have the infection, 800 tested negative and 100 tested positive. Which of the following percentages indicates the specificity of this new test?

(A) 10%
(B) 44%
(C) 80%
(D) 89%
(E) 98%

We break down the concepts in simple terms in shorter videos so students can focus on the Educational Objective to get a deep understanding of the concept.

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Jason Colip, MD - USMLE Instructor
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