Diagnostic performance: Negative predictive values (NPV) from a ROC curve
npv(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.
npv: The negative 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.