An Analysis of Predictive Sample-to-Cutoff Index for HIV Infection Confirmation Using Elecsys® HIV Combi PT Assay

Table 2

Sensitivity and specificity at different cutoffs.

	Values at different cutoffs
	1.00	5.94	9.87	12.79	37.75
Samples ≥COI	292	104	96	87	80
FP samples	210	22	14	6	0
Eliminated FP	—	188	196	204	210
TP samples	82	82	82	81	80
Sensitivity (%)	100	100	100	98.780	97.561
Specificity (%)	99.86	99.985	99.991	99.996	100
PPV (%)	28.08	78.85	85.42	93.10	100