predictive values

How are Predictive Values Calculated?

Predictive values are derived from the sensitivity and specificity of the test, as well as the prevalence of the disease in the population being tested.
PPV = (True Positives) / (True Positives + False Positives)
NPV = (True Negatives) / (True Negatives + False Negatives)
These calculations illustrate the importance of accurately identifying true positives and true negatives in diagnostic testing.

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