PPV and NPV Calculator
From Sensitivity, Specificity & Prevalence
From Counts (2x2 Table)
Formula
PPV = (Sens*Prev) / (Sens*Prev + (1-Spec)*(1-Prev))
Frequently Asked Questions
What is PPV?
Positive Predictive Value is the probability that a person with a positive test truly has the condition. It depends heavily on prevalence.
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