Table 2 Accuracy of RSNA different classifications for diagnosis of COVID-19 as calculated for each of the three raters
| Â | Rater 1 | Rater 2 | Rater 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Â | 95% CI | 95% CI | 95% CI | ||||||
Statistic | RSNA atypical to typical | RSNA indeterminate to typical | RSNA typical | RSNA atypical to typical | RSNA indeterminate to typical | RSNA typical | RSNA atypical to typical | RSNA indeterminate to typical | RSNA typical |
Correct classification | 61% | 68% | 69% | 55% | 61% | 62% | 56% | 66% | 66% |
Misclassification | 39% | 32% | 31% | 45% | 39% | 38% | 44% | 34% | 34% |
Sensitivity | 79% | 65% | 49% | 74% | 68% | 47% | 76% | 68% | 48% |
Specificity | 41% | 71% | 94% | 34% | 52% | 80% | 31% | 63% | 87% |
FPR | 59% | 29% | 6% | 66% | 48% | 20% | 69% | 37% | 13% |
FNR | 21% | 35% | 51% | 26% | 32% | 53% | 24% | 32% | 52% |
Prevalence | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% |
PPV | 61% | 73% | 90% | 57% | 63% | 74% | 57% | 69% | 81% |
NPV | 62% | 64% | 61% | 52% | 58% | 56% | 53% | 63% | 58% |
Positive likelihood ratio | 1.33 | 2.28 | 7.97 | 1.11 | 1.41 | 2.35 | 1.11 | 1.87 | 3.66 |
Negative likelihood ratio | 0.52 | 0.48 | 0.55 | 0.78 | 0.62 | 0.66 | 0.75 | 0.50 | 0.60 |
Relative risk | 1.60 | 2.00 | 2.30 | 1.18 | 1.48 | 1.68 | 1.21 | 1.86 | 1.96 |
Odds ratio | 2.55 | 4.71 | 14.5 | 1.43 | 2.28 | 3.56 | 1.48 | 3.76 | 6.10 |