Double threshold receiver operating characteristic plot for three-modal continuous predictors

The receiver-operating characteristics (stROC) analysis depicts the performance of a population-wise bimodal-distributed, quantitative continuous random variable for distinguishing dichotomous outcomes using a single threshold. However, test results that have three-modal distributions show no-better-than-chance discriminative performance. This study proposes a parameter-free ROC plot analysis with an application to random variables with a …