Table 4 Accuracy of different CO-RADS classes 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 | CO-RADS 2–5 | CO-RADS 3–5 | CO-RADS 4–5 | CO-RADS 5 | CO-RADS 2–5 | CO-RADS 3–5 | CO-RADS 4–5 | CO-RADS 5 | CO-RADS 2–5 | CO-RADS 3–5 | CO-RADS 4–5 | CO-RADS 5 |
Correct classification | 61% | 68% | 70% | 64% | 55% | 61% | 62% | 62% | 57% | 65% | 66% | 64% |
Misclassification | 39% | 32% | 30% | 36% | 45% | 39% | 38% | 38% | 43% | 35% | 34% | 36% |
Sensitivity | 76% | 65% | 51% | 38% | 74% | 68% | 59% | 47% | 76% | 68% | 62% | 49% |
Specificity | 42% | 71% | 91% | 96% | 34% | 52% | 66% | 80% | 34% | 62% | 71% | 82% |
FPR | 58% | 29% | 9% | 4% | 66% | 48% | 34% | 20% | 66% | 38% | 29% | 18% |
FNR | 24% | 35% | 49% | 63% | 26% | 32% | 41% | 53% | 24% | 32% | 38% | 51% |
Prevalence | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% | 54% |
PPV | 61% | 73% | 88% | 91% | 57% | 63% | 67% | 74% | 58% | 68% | 72% | 76% |
NPV | 60% | 64% | 61% | 56% | 52% | 58% | 58% | 56% | 55% | 62% | 61% | 57% |
Positive likelihood ratio | 1.31 | 2.28 | 5.92 | 8.63 | 1.11 | 1.41 | 1.73 | 2.35 | 1.16 | 1.79 | 2.15 | 2.66 |
Negative likelihood ratio | 0.56 | 0.48 | 0.53 | 0.65 | 0.78 | 0.62 | 0.62 | 0.66 | 0.69 | 0.51 | 0.54 | 0.63 |
Relative risk | 1.52 | 2.00 | 2.27 | 2.09 | 1.18 | 1.48 | 1.58 | 1.68 | 1.28 | 1.80 | 1.85 | 1.78 |
Odds ratio | 2.33 | 4.71 | 11.14 | 13.20 | 1.43 | 2.28 | 2.78 | 3.56 | 1.67 | 3.49 | 4.01 | 4.22 |