Medmastery: PPV and Specificity

The team at Medmastery are providing LITFL readers with a series of FOAMed courses from across their website. Over the next few weeks, we’ll be posting videos from their Epidemiology Essentials course.

In this video, Franz Wiesbauer looks at the impact of specificity and sensitivity on positive predictive value (and thus validity of a test) and why one has a bigger impact than the other.


Internal medicine physician at the Medical University of Vienna. Masters in Public Health at Johns Hopkins University as a Fulbright student. Passionate about teaching taking difficult concepts and making them super easy so that everyone can understand

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Franz Wiesbauer, MD

Internist with a specialization in cardiology and Medmastery course director.
Medmastery Online Education

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