Positive predictive value

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[edit] Definition

  • The positive predictive value (aka precision rate) is the proportion of patients with positive test results who are correctly diagnosed.
Relationships among terms
Disease
True False
Test
outcome
Positive True Positive (TP) False Positive (FP)
Negative False Negative (FN) True Negative (TN)


Positive Predictive Value = TP/ (TP + FP)

[edit] See also

[edit] References

  • Gunnarsson RK, Lanke J. The predictive value of microbiologic diagnostic tests if asymptomatic carriers are present. Statist. Med. 2002; 21:1773-1785