Screening-test Tree Diagram

As discussed on the blog, results from screening tests can be misleading, especially when the condition being tested for is rare. The interactive tree diagram below is supplementary to that article. Drag the sliders to change the values for prevalence, sensitivity, and specificity and see the consequences for a theoretical test population of 10,000 people. Click on a node (rectangle) to toggle node filling on and off.

Prevalence = %

Sensitivity = %

Specificity = %

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