Table 1.
Accuracy metrics (point estimates and 95%CIs) of three rapid tests compared to results of HBsAg One® and ETI-MAK-4®, enzyme immunoassays
| Manufacturer | TP | FN | TN | FP | Sensitivity | Specificity | PPV | NPV | K (CI%) |
|---|---|---|---|---|---|---|---|---|---|
| HBsAg non-reactive/HBsAg reactive (n = 393) | |||||||||
| Vikia HBsAg® | 101 | 2 | 290 | 0 | 98.06 % (93.16–99.76) | 100.00 % (98.74–100.00) | 100.00 % (96.42–100.00) | 99.32 % (97.54–99.92) | 98.68 % (96.85–100.00) |
| Imuno-Rápido HBsAg® | 98 | 5 | 287 | 3 | 95.15 % (89.03–98.40) | 98.97 % (97.01–99.79) | 97.03 (91.58–99.38) | 98.29 % (96.05–99.44) | 94.7 % (91.07–98.33) |
| HBsAg teste rápido® | 96 | 7 | 287 | 3 | 93.20 % (86.51–97.22) | 98.97 % (97.01–99.79) | 96.97 % (91.39–99.37) | 97.62 % (95.16–99.04) | 93.34 % (89.26–97.42) |
Legends: TP True positive, FN False negative, TN True negative, FP False positive, PPV Positive Predictive Value, NPV Negative Predictive Value, k Kappa statistics, n number of observations (biological samples), CI confidence interval