Table 3.

 Screening test indices at each level OC curve

Score	Sensitivity	Specificity	PPV	NPV
>0	0.99 (0.97, 1.00)	0.08 (0.04, 0.14)	0.65 (0.60, 0.70)	0.83 (0.51, 0.97)
>1	0.88 (0.83, 0.92)	0.41 (0.33, 0.50)	0.72 (0.66, 0.77)	0.66 (0.54, 0.76)
>2	0.45 (0.38, 0.51)	0.84 (0.76, 0.90)	0.83 (0.75, 0.89)	0.47 (0.40, 0.53)

PPV, positive predictive value; NPV, negative predictive value.