Table 2.
CT image interpretations of patients with SARS-CoV-2 pneumonia categorized by severity type
| Chest CT findings | n (%) | p1 | ||
|---|---|---|---|---|
| All | Common type | Severe type | ||
| (N = 120) | (n = 90) | (n = 30) | ||
| Bilateral | 68 (57%) | 40 (44%) | 28 (93%) | < 0.001 |
| Ground-grass opacities | 107 (89%) | 78 (87%) | 29 (97%) | 0.181 |
| Nodules | 65 (54%) | 53 (59%) | 12 (40%) | 0.072 |
| Linear densities | 75 (63%) | 50 (56%) | 25 (83%) | 0.007 |
| Consolidation | 62 (52%) | 37 (41%) | 25 (83%) | < 0.001 |
| Crazy paving | 30 (25%) | 9 (10%) | 21 (70%) | < 0.001 |
| Bronchiectasis | 14 (12%) | 6 (7%) | 8 (27%) | 0.007 |
| Effusion | 9 (8%) | 0 | 9 (30%) | < 0.001 |
| Lymphadenopathy | 5 (4%) | 1 (1%) | 4 (13%) | 0.134 |
| Air bronchograms | 24 (20%) | 5 (6%) | 19 (63%) | < 0.001 |
| Tree-in-bud sign | 9 (8%) | 4 (4%) | 5 (17%) | 0.042 |
| White lung | 20 (17%) | 0 | 20 (67%) | < 0.001 |
| Lung lobes involved | ||||
| Upper right lobe | 41 (34%) | 16 (18%) | 25 (83%) | < 0.001 |
| Middle right lobe | 50 (42%) | 24 (27%) | 26 (87%) | < 0.001 |
| Lower right lobe | 83 (69%) | 55 (61%) | 28 (93%) | < 0.001 |
| Upper left lobe | 48 (40%) | 22 (24%) | 26 (87%) | < 0.001 |
| Lower left lobe | 79 (66%) | 50 (56%) | 29 (97%) | < 0.001 |
| Number of lobes involved | < 0.001 | |||
| 0 | 6 (5%) | 6 (7%) | 0 | |
| 1 | 43 (36%) | 41 (46%) | 2 (7%) | |
| 2 | 24 (20%) | 22 (24%) | 2 (7%) | |
| 3 | 8 (7%) | 8 (9%) | 0 (0) | |
| 4 | 9 (8%) | 7 (8%) | 2 (7%) | |
| 5 | 30 (25%) | 6 (7%) | 24 (80%) | |
| Predominant distribution | ||||
| Peripheral | 109 (91%) | 79 (88%) | 30 (100%) | 0.064 |
| Central | 39 (33%) | 20 (22%) | 19 (63%) | < 0.001 |
| Predominant patterns | ||||
| Ground-glass opacities | 111 (93%) | 82 (91%) | 29 (97%) | 0.447 |
| Consolidation | 66 (55%) | 41 (46%) | 25 (83%) | < 0.001 |
| Reticulation | 22 (18%) | 4 (4%) | 18 (60%) | < 0.001 |
| Total severity score, mean (SD) | 4.4 (5.3) | 2.0 (1.5) | 11.6 (6.2) | < 0.001 |
| Total level, mean (SD) | 1.6 (1.0) | 1.2 (0.5) | 2.9 (1.0) | < 0.001 |
Abbreviation: SARS-CoV-2, severe acute respiratory syndrome coronavirus 2; n, number of cases
1For categorical variables, p values were derived from χ2 test, Fisher’s exact test. For continuous variables, p values were derived from Student t test or analysis of variance (ANOVA)
2p values for the comparison between severe and all common type patients