PPV: calculates the positive predictive value (PPV) of a diagnostic test.
Description
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.
Usage
PPV(sens, spec, prev)
Arguments
sens
the sensitivity of the test
spec
the specificity of the test
prev
the prevalence of the disease
Value
the positive predictive value of the test
References
van Hulst, R. 2018. Evaluating Scientific Evidence. ms.