Table 2.
Comparison of Results from LFIAs and Abbott ELISA
| ELISA | |||||
|---|---|---|---|---|---|
| Positive | Negative | Total | Performance (95% CI) | ||
| Self-Test LFIA | Positive | 285 | 98 | 383 | Sensitivity: 82.1% (77.7–86.0) |
| Negative | 62 | 4260 | 4322 | Specificity: 97.8% (97.3–98.2) | |
| Total | 347 | 4358 | 4705 | ||
| Nurse-Performed LFIA | Positive | 298 | 72 | 370 | Sensitivity: 76.4% (71.9–80.5) |
| Negative | 92 | 4744 | 4836 | Specificity: 98.5% (98.1–98.8) | |
| Total | 390 | 4816 | 5206 | ||
Abbreviations: CI, confidence interval; ELISA, enzyme-linked immunosorbent assay; LFIA, lateral flow immunoassay.