Table 1 Sensitivity and specificity of the in-house TPO-Ab ELISA for 182 matched plasma, venous DBS (vDBS), and fingerprick DBS (fDBS) samples
True positives (TP) | True negatives (TN) | False negatives (FN) | False positives (FP) | Sensitivity (%) | Specificity (%) | |||
|---|---|---|---|---|---|---|---|---|
TP/(TP + FN) | 95% CI | TN/(TN+ FP) (%) | 95% CI | |||||
Plasma | 12 | 169 | 0 | 1 | 100 | 73.5–100% | 99.4 | 96.8–100% |
vDBS | 12 | 168 | 0 | 2 | 100 | 73.5–100% | 98.8 | 95.8–99.9% |
fDBS | 11 | 167 | 1 | 3 | 91.7 | 61.3–99.8% | 98.2 | 94.9–99.6% |