Table 2.
Years of experience and performance of radiologist in differentiating COVID-19 from non-COVID-19 pneumonia.
| Reader | Experience in Thoracic Radiology, years | Rated as COVID-19 pneumonia, n / Rated as non-COVID-19 pneumonia, n | Accuracy, % (95% CI) | Sensitivity, % (95% CI) | Specificity, % (95% CI) | PPV, % (95% CI) | NPV, % (95% CI) |
|---|---|---|---|---|---|---|---|
| R1 | 33 | 101/283 | 85 (81–89) | 74 (64–83) | 88 (84–92) | 66 (56–75) | 92 (88–95) |
| R2 | 28 | 93/291 | 90 (86–93) | 80 (70–88) | 93 (89–96) | 77 (68–85) | 94 (90–96) |
| R3 | 10 | 136/248 | 82 (78–86) | 87 (78–93) | 80 (75–85) | 57 (49–66) | 95 (92–97) |
| R4 | 4 | 80/304 | 90 (86–92) | 72 (62–81) | 95 (92–97) | 81 (71–89) | 92 (88–95) |
| R5 | Radiology resident in last year of training | 88/296 | 92 (89–95) | 82 (73–89) | 95 (92–97) | 84 (75–91) | 95 (91–97) |
N = absolute number of cases, 95% CI = 95% confidence intervals.