Table 2. CT Imaging Manifestations of Patients with COVID-19.
| Imaging Manifestation | Training Cohort (n = 166) | Validation Cohort (n = 72) | P |
|---|---|---|---|
| Regional involvement (%) | 0.650 | ||
| Unilateral | 15 (9.0) | 9 (12.5) | |
| Bilateral | 146 (88.0) | 58 (80.6) | |
| Scattering distribution (%) | 0.205 | ||
| Focal | 10 (6.0) | 7 (9.7) | |
| Multifocal | 117 (70.5) | 51 (70.8) | |
| Diffuse | 34 (20.5) | 9 (12.5) | |
| Transverse distribution (%) | 0.262 | ||
| Central region | 5 (3.0) | 1 (1.4) | |
| Subpleural region | 110 (66.3) | 52 (72.2) | |
| Both | 46 (27.5) | 14 (19.4) | |
| Number of involved pulmonary segments | 7.0 (0–18) | 5.5 (0–18) | 0.151 |
| Extent | 6 (0–23) | 5 (0–22) | 0.071 |
| Shape (%) | 0.430 | ||
| Nodular | 3 (1.8) | 1 (1.4) | |
| Patchy | 128 (77.1) | 55 (76.4) | |
| Large patchy | 25 (15.7) | 7 (9.7) | |
| Stripe | 5 (3.0) | 4 (5.6) | |
| Opacification (%) | 0.439 | ||
| GGO | 30 (18.1) | 15 (20.8) | |
| Mixed GGO and consolidation | 117 (70.5) | 48 (66.7) | |
| Consolidation | 14 (8.4) | 4 (5.6) | |
| Crazy-paving sign (%) | 36 (21.7) | 12 (16.7) | 0.477 |
| Halo sign (%) | 36 (21.7) | 13 (18.1) | 0.644 |
| Reversed halo sign (%) | 5 (3.0) | 1 (1.4) | 0.777 |
| Air bronchogram (%) | 60 (36.1) | 21 (29.2) | 0.371 |
| Bronchiectasis (%) | 15 (9.0) | 6 (8.3) | 1.000 |
| Vascular enlargement (%) | 80 (48.2) | 29 (40.3) | 0.325 |
| Pleural thickening (%) | 84 (50.6) | 29 (40.3) | 0.186 |
| Pleural retraction (%) | 40 (24.1) | 26 (36.1) | 0.081 |
| Pleural effusion (%) | 5 (3.0) | 6 (10.0) | 0.144 |
| Mediastinal lymphadenopathy (%) | 3 (1.8) | 1 (1.4) | 1.000 |
| Change in liver density (HU) | 7.79 ([-16.41]–25.90) | 9.15 ([-28.50]–28.30) | 0.060 |
GGO = ground-glass opacity