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What is the predictive value of a medical test?

An important aspect of accuracy of a test is called predictive value. This has to do with the confidence one can have in a specific test result. Positive predictive value (PPV) is the chance that a positive test result is really due to the disease. Negative predictive value (NPV) is the probability that a negative result means no disease is present.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.