Table 1.

Sensitivity, specificity, negative and positive predictive values and kappa index for anti-HCV, HBsAg and anti-HBs detection in DBS samples using ECLIA

	Anti-HCV		Anti-HBc		HBsAg
	Value (%)	IC (%)	Value (%)	IC (%)	Value (%)	IC (%)
Sensitivity	95.37	89.53–98.48	86.49	80.70–91.06	94.37	86.20–98.44
Specificity	99.45	98.04–99.93	97.76	95.63–99.03	98.99	97.09–99.79
Positive predictive value	98.10	92.82–99.52	95.24	90.96–97.55	95.71	87.85–98.57
Negative predictive value	98.64	96.87–99.42	93.32	90.65–95.26	98.66	96.61–99.48
Kappa index	0.957	0.926–0.988	0.861	0.815- 0.907	0.938	0.893–0.983