Positive predictive value
Encyclopedia : P : PO : POS : Positive predictive value
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 = --------------------------------------------------------------- sensitivity x prevalence + (1 - specificity) x (1 - prevalence)
References
- 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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