Table 1 Sensitivity, specificity, positive predictive value, negative predictive value, and kappa index for the detection of HBsAg and anti-HCV on DBS compared to plasma
From: Using dried blood spot for the detection of HBsAg and anti-HCV antibodies in Cameroon
| Â | HBsAg | Anti-HCV | ||||
|---|---|---|---|---|---|---|
Value | 95% CI | p-value | Value | 95% CI | p-value | |
Se | 100 | [96.3–100] | 1 | 99 | [94.5–99.9] | < 0.01 |
Sp | 99 | [94.5–99.9] | < 0.01 | 98 | [92.9–99.7] | < 0.01 |
PPV | 99.0 | [94.6–99.9] | < 0.01 | 98 | [93.0–99.7] | < 0.01 |
NPV | 100 | [96.3–100] | 1 | 99 | [94.5–99.9] | < 0.01 |
Kappa index | 0.99 | [0.96–1] | – | 0.97 | [0.93–1] | – |