Table 2.
CT imaging findings in 13 patients with COVID-19 and 92 with influenza pneumonia
| CT findings | COVID-19 | Influenza pneumonia | p* | Cohen κ# |
|---|---|---|---|---|
| Lesion distribution | 0.000 | 0.945 | ||
| Central | 1 (7.7%) | 69 (75.0%) | ||
| Peripheral | 5 (38.5%) | 3 (3.3%) | ||
| Diffuse | 0 | 20 (21.7%) | ||
| Non-specific | 7 (53.8%) | 0 | ||
| Lobe predomination | 0.001 | 0.927 | ||
| Superior lobe | 3 (23.1%) | 22 (23.9%) | ||
| Inferior lobe | 2 (15.4%) | 53 (57.6%) | ||
| Middle lobe | 1 (7.7%) | 7 (7.6%) | ||
| Balanced predomination | 7 (53.8%) | 10 (10.9%) | ||
| Lesion number | 0.285 | 0.914 | ||
| Single lesion | 2 (15.4%) | 12 (13.0%) | ||
| Multiple lesions in one lobe | 2 (15.4%) | 28 (30.4%) | ||
| Multiple lesions in one lung | 0 | 12 (13.0%) | ||
| Multiple lesions in bilateral lungs | 9 (69.2%) | 40 (43.5% | ||
| Lesion attenuation | 0.908 | 0.851 | ||
| GGO | 4 (30.8%) | 35 (38.0%) | ||
| Consolidation | 1 (7.7%) | 10 (10.9%) | ||
| GGO with consolidation | 8 (61.5%) | 47 (51.1%) | ||
| Lesion margin | 0.004 | 0.819 | ||
| Clear | 6 (46.2%) | 10 (10.9%) | ||
| Vague | 7 (53.8%) | 82 (89.1%) | ||
| GGO involvement pattern | 0.000 | 0.887 | ||
| Patchy GGO | 5 (38.5%) | 5 (5.4%) | ||
| Cluster-like GGO | 1 (7.7%) | 71 (77.2%) | ||
| Combination of GGO and consolidation opacities | 6 (46.2%) | 6 (6.5%) | ||
| Whole consolidation | 1 (7.7%) | 10 (10.9%) | ||
| Lesion contour | 0.000 | 0.807 | ||
| Shrinking | 9 (69.2%) | 1 (1.1%) | ||
| Non-shrinking | 4 (30.8%) | 91 (98.9%) | ||
| Bronchial wall thickening | 0 | 30 (32.6%) | 0.018 | 0.838 |
| Air bronchogram | 6 (46.2%) | 25 (27.2%) | 0.197 | 0.841 |
| Tree-in-bud sign | 0 | 22 (23.9%) | 0.065 | 0.885 |
| Interlobular septal thickening | 0 | 6 (6.5%) | 1 | 0.904 |
| Intralobular septal thickening | 2 (15.4%) | 5 (5.4%) | 0.208 | 0.941 |
| Pleura effusion | 0 | 5 (5.4%) | 1 | 1 |
GGO, ground-glass opacity. *p < 0.05 indicates a significant difference
#Cohen κ coefficient when using Kappa test