Table 3.
Positive and negative predictive value of RAD at different COVID‐19 prevalence values (%)
| DP (%) | Positive predictive value | Negative predictive value | Accuracy | |
|---|---|---|---|---|
| 10 | 71.3% (95% CI: 45–88) | 98.5% (95% CI: 96–99) | 95.2% (95% CI: 89–98) | |
| Any RAD | 20 | 84.8% (95% CI: 65–94) | 96.8% (95% CI: 92–99) | 94.3% (95% CI: 88–98) |
| 30 | 90.6% (95% CI: 76–97) | 94.6% (95% CI: 87–98) | 93.4% (95% CI: 87–97) | |
| 50 | 95.7% (95% CI: 88–99) | 88.1% (95% CI: 75–95) | 91.6% (95% CI: 85–96) | |
| 70 | 98.1% (95% CI: 95–99) | 76.2% (95% CI: 56–89) | 89.8% (95% CI: 83–95) | |
| 10 | 64.7% (95% CI: 32%–88%) | 100% | 94.6% (95% CI: 83–99) | |
| Panbio | 20 | 80.5% (95% CI: 52–94) | 100% | 95.2% (95% CI: 84–99) |
| 30 | 87.6% (95% CI: 65–96) | 100% | 95.8% (95% CI: 85–100) | |
| 50 | 94.3% (95% CI: 81–98) | 100% | 97% (95% CI: 86–100) | |
| 70 | 97.5% (95% CI: 91–99) | 100% | 98.2% (95% CI: 88–100) | |
| 10 | 80% (95% CI: 36–97) | 98% (95% CI: 95–99) | 96.1% (95% CI: 88–99) | |
| Eco | 20 | 90% (95% CI: 56–98) | 95.6% (95% CI: 90–98) | 94.6% (95% CI: 86–99) |
| 30 | 93.9% (95% CI: 69–99) | 92.6% (95% CI: 84–97) | 94% (95% CI: 84–98) | |
| 50 | 97.3% (95% CI: 84‐100) | 84.3% (95% CI: 69–93) | 89.8% (95% CI: 80–96) | |
| 70 | 98.8% (95% CI: 82–100) | 69.7% (95% CI: 49–85) | 86.6% (95% CI: 76–94) |
Abbreviations: CI, confidence interval; COVID‐19, coronavirus disease 2019; DP, disease prevalence; RAD, rapid antigen detection test (COVID‐19 Ag ECO Test [Eco] and Panbio COVID‐19 Ag Rapid Test Abbott [Panbio]).
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