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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

From: Evaluating HBsAg rapid test performance for different biological samples from low and high infection rate settings & populations

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)
  1. 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