Positive predictive value and negative predictive value

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Positive predictive value (abbreviated PPV) and negative predictive value (abbreviated NPV) are statistical descriptors of diagnostic tests that depend on the prevalence.

Positive predictive value


Where:

  • TP = true positives.
  • FP = false positives.

Negative predictive value


Where:

  • TN = true negatives.
  • FN = false negatives.

See also