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Discussion Starter #1
hey, i added another lecture to my youtube channel. it quickly explains the effect that changes in the cut-off level for a positive test and the prevalence of a disease have on the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of a test.

Sensitivity, Specificity, PPV, and NPV: Quick Comparison

 

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Discussion Starter #2
as a complement to the video above, here is a more in-depth lecture comparing sensitivity, specificity, ppv and npv. each step of the video is now animated in order to enhance the learning experience.

to watch the video, click on the following youtube link...
Sensitivity vs. Specificity vs. PPV vs. NPV: Step-By-Step Comparison

the goal of this lecture is to help you visualize the effect that changes in the cut-off level for a positive test and the prevalence of a disease have on each of these measures of test performance.

 
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