The positive predictive value is the proportion of patients with positive test results who are correctly diagnosed. It is considered the physician's gold standard, as it reflects the probability that a positive test reflects the underlying condition being tested for.

Positive predictive value = #true pos./(#true pos. + #false pos.), OR:

sensitivity x prevalence PPV =

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--- sensitivity x prevalence + (1 - specificity) x (1 - prevalence)

References

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• ALTMAN DG, BLAND JM "DIAGNOSTIC-TESTS-2 - PREDICTIVE VALUES" BRITISH MEDICAL JOURNAL 309 (6947): 102-102 JUL 9 1994

See also

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• Negative predictive value
• Relevance (information retrieval)
• Receiver-operator characteristic

Medicine

Positiver prädiktiver Wert