Figure 2

Disease prediction performance evaluated by ROC curves for the hypothetical continuous markers with different relative risks. ROC curves for continuous risk marker with different odds ratios (from bottom to top OR = 1.5, 2, 4, 10, 20, 50), which corresponding to the distribution plots of continuous markers shown in Figure 1. The crosses correspond to a fixed sensitivities; the circles to a fixed specificities; and triangles to equal sensitivities and specificities. Their corresponding PAR% values are shown in Table 2.