Analyzing Receiver Operating Characteristic Curves with SAS

Ordinal Predictors

5.1 Introduction

5.2 Credit Rating Example

5.3 Empirical ROC Curve for Ordinal Predictors

5.4 Area under the Empirical ROC Curve

5.5 Latent Variable Model

5.6 Comparing ROC Curves for Ordinal Markers

5.1 Introduction

Chapter 3 addressed the single continuous predictor, probably the most natural and common setting for ROC curves. Nevertheless, the idea of an ROC curve applies equally well to an ordinal predictor. This chapter investigates how techniques from the previous chapter can be extended to accommodate an ordinal predictor.

Ordinal predictors can arise in a variety of ways. Sometimes, they are simply the result of ...