Positivity Rate Calculation

Medical Statistics: Calculating Positive and Negative Predictive Values using a 2x2 table

Trouble remembering how to calculate predictive values for a screening or diagnostic test from a 2x2 table? Here's an easy way to remember. Make sure the table is set up so that "disease" is at the top and "test" is along the side. --------------- From the Making Decisions Better: The Information Mastery Curriculum and Assessment Program, an ...

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