Diagnostic performance: Positive predictive values (PPV) from a ROC curve
ppv(roc, prevalence)
A matrix with the following columns:
threshold
: The thresholds used to compute the sensitivity and specificity.
sensitivity
: The sensitivities at the threshold.
specificity
: The specificities at the threshold.
ppv
: The positive predictive values at the threshold.
prevalence
: The prevalence of the endpoint in the study population, as provided in the input.
Object of class pROC.
Prevalence of the endpoint in the study population.