The probability of having a disease given a positive test result is known as

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The positive predictive value (PPV) is the probability of having the disease given a positive test result. It takes into account both the sensitivity and specificity of the test, as well as the prevalence of the disease in the population being tested. Accuracy refers to how closely a test result reflects the true value or status of the condition being tested for, while specificity relates to the proportion of true negatives identified by the test. Negative predictive value (NPV) is the probability of not having the disease given a negative test result.

The Probability of Having a Disease Given a Positive Test