Table 4.

 Screening test indices at each level OC curve (Ghana test data)

Score	Sensitivity	Specificity	PPV	NPV
>0	0.94 (0.87, 0.98)	0.15 (0.05, 0.36)	0.79 (0.70, 0.86)	0.44 (0.15, 0.77)
>1	0.64 (0.53, 0.74)	0.46 (0.27, 0.66)	0.80 (0.69, 0.88)	0.27 (0.15, 0.43)
>2	0.25 (0.16, 0.35)	0.92 (0.73, 0.99)	0.92 (0.72, 0.99)	0.26 (0.18, 0.37)

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