Table 2. Test characteristics of Determine HBsAg determined in comparison with a reference test in adult and antiretroviral-naïve HIV-1 positive patients in Ifakara, Tanzania.
TP | FP | TN | FN | Sensitivity | Specificity | NPV | PPV | Inter-rater Agreement |
N | n | n | n | % (95% CI) | % (95% CI) | % (95% CI) | % (95% CI) | κ (95% CI) |
24 | 0 | 247 | 1 | 96 (82.8–99.6) | 100 (98.9–100) | 99.5 (98.1–99.9) | 100 (90.1–100) | 0.97 (0.93–1) |
Abbreviations: CI, confidence interval; FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value; TN, true negative; TP, true positive. Agreement is measured between two independent readings of Determine HBsAg.