# positive predictive value

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Related to positive predictive value: Odds ratio, Likelihood ratio

## positive predictive value

Statistics The number of true positives divided by the sum of true positives–TP and false positives–FP, a value representing the proportion of subjects with a positive test result who actually have the disease, aka 'efficiency' of a test. Cf Negative predictive value, ROC–receiver operating characteristic.

## pos·i·tive pre·dic·tive val·ue

(poz'i-tiv prĕ-dik'tiv val'yū)
The probability that a positive result accurately indicates that the analyte or the specific disease is present.

## Positive predictive value (PPV)

The probability that a person with a positive test result has, or will get, the disease.
Mentioned in: Genetic Testing

## predictive value

a measure used by clinicians to interpret diagnostic test results. See also sensitivity, specificity.

positive predictive value
the probability that a patient with a positive test result really does have the condition for which the test was conducted.
negative predictive value
the probability that a patient with a negative test result really is free of the condition for which the test was conducted.
References in periodicals archive ?
Although this corresponds with a moderately high positive predictive value of 83.
The sensitivity, specificity, positive predictive values, and negative predictive values of the TBc ID test were 98.
For Mp, there were acceptable diagnosis values in the sensitivity, specificity, positive predictive value, and negative predictive value in both age ranges.
9-fold the upper limit of normal on the test) had a positive predictive value of 86.
The analysis of FNAC results after the histopathological examination of postoperative tissue showed sensitivity, specificity, positive predictive value, and negative predictive value as follows: 87.
The positive predictive values of these measurements ranged from 6% to 12%.
5 mM for the lactate concentration to achieve a sensitivity of 86%, specificity of 92%, positive predictive value of 92%, negative predictive value of 87%, kappa coefficient of 78%, and false negative of 15%.
It has a much higher positive predictive value if ordered selectively in patients with a higher probability of a CTD: morning stiffness, sicca symptoms, and arthralgias or synovitis in a rheumatoid arthritis distribution," the rheumatologist continued.
36%, specificity 100%, positive predictive value 100% and negative predictive value of 71.
who concluded that 'Decreasing mother-to-child HIV transmission rates reduce the positive predictive value of a single HIV DNA PCR test result, necessitating adaptations to diagnostic algorithms to avoid misdiagnosis and inappropriate treatment, especially with early initiation of antiretroviral therapy in asymptomatic infants.
As a result, a positive HPV test result had a lower positive predictive value than did a positive Pap smear: Only 12% of women with positive HPV tests had CIN 2 or worse lesions, compared with 91% of those with positive Pap smears.
However, the positive predictive value (a positive test indicating there is a heart abnormality) was low, meaning many of the positive tests occurred on children who had no heart abnormality.

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