PPV {evidence} | R Documentation |
The positive predictive value (PPV) of a dianostic test is the probability that someone with a positive diagnostic test for a condition does have the condition. The PPV can easily be calculated from the prevalence, the sensitivity, and the specificity, but this function automates the procedure.
PPV(sens, spec, prev)
sens |
the sensitivity of the test |
spec |
the specificity of the test |
prev |
the prevalence of the disease |
the positive predictive value of the test
Robert van Hulst
van Hulst, R. 2018. Evaluating Scientific Evidence. ms.
PPV(0.9, 0.8, 0.003)