TABLE 2.

Sensitivity and specificity of HS and 903 dried blood^a

Determinant	903b		HSc
	Value (%)	95% CI	Value (%)	95% CI
Sensitivity	93.5	82.0–96.6	95.6	84.9–99.5
Specificity	100	85.2–100	100	85.2–100
Positive predictive value	100		100
Negative predictive value	88.5	72.0–95.8	92.00	74.8–97.8
Accuracy	95.7	87.8–99.1	97.1	89.8–99.6

^aHS and 903 spots were prepared from 30 reactive and 21 nonreactive clinical samples, plus 16 reactive and 2 nonreactive members from the SeraCare PRA204 low-titer panel.

^bFor 903, 43/46 of the reactive plasma samples were reactive from 903 (3 were nonreactive), and 23/23 nonreactive from plasma were nonreactive from 903.

^cFor HS, 44/46 of the reactive plasma samples were reactive from HS (2 were nonreactive), and 23/23 nonreactive from plasma were nonreactive from 903.