Predictive values

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Term Definition
Predictive values

The predictive value of a test is a measure of the times that the value (positive or negative) is the true value. That is, the probability that a person has the disease being tested for. 

Predictive values are parameters that define the chance of a reactive test result being truly positive (the PPV) or a non-reactive test result being truly negative (the NPV) for the substance that a test is designed to detect.



Development of this site and the 2014 and 2017 revisions of the testing policies was supported by: Australian Government Department of Health and Ageing