Table 4.

Analysis of the sensitivity and specificity of the HemoTypeSC™ test for the detection of hemoglobin A, S, and C.

Type of Hb	Sensitivity (TP/(TP + FN))		Specificity (TN/(TN + FN))		PPV (TP/(TP + FP))		NPV (TN/(TN + FN))
A	239/239	100%	97/97	100%	239/239	100%	97/97	100%
S	126/126	100%	110/110	100%	126/126	100%	110/110	100%
C	28/28	100%	308/308	100%	28/28	100%	308/308	100%
Total	393/393	100%	515/515	100%	393/393	100%	515/515	100%

FP, false-positives; FN, false-negatives; TP, true-positives; TN, true-negatives; PPV, positive-predictive value; NPV, negative-predictive value.