Table 2.
Comparison of particular characteristics between the groups on peak CT imaging
| Characteristic | Non-fibrotic group (109), N (%) | Fibrotic group (101), N (%) | p value | ||
|---|---|---|---|---|---|
| Number of affected segments | 9.69 ± 3.13 5–16 | 15.12 ± 2.91 8–22 | t test 13.0 | <0.001 | |
| Location | Upper lobe | 53 (48.6%) | 45 (44.6%) |
Z test 0.45 |
0.65 |
| Middle lobe or lingula | 78 (71.6%) | 80 (79.2%) |
Z test 1.12 |
0.26 | |
| Lower lobe | 85 (78.0%) | 87 (86.1%) |
Z test 1.35 |
0.18 | |
| Distribution | Central | 10 (9.2%) | 9 (8.9%) |
Z test 0.17 |
0.86 |
| Peripheral | 65 (59.6%) | 74 (73.3%) |
Z test 1.94 |
0.05 | |
| Central and peripheral | 34 (31.2%) | 28 (27.7%) |
Z test 0.40 |
0.69 | |
| Opacification | Pure GGO | 56 (51.4%) | 20 (19.8%) |
Z test 4.61 |
<0.001 |
| GGO with consolidation | 30 (27.5%) | 47 (46.5%) |
Z test 2.71 |
0.007 | |
| Pure consolidation | 23 (21.1%) | 34 (33.7%) |
Z test 1.89 |
0.06 | |
| Bronchiectasis | 3 (2.8%) | 8 (7.9%) |
Z test 1.37 |
0.17 | |
| Crazy paving | 66 (60.6%) | 87 (86.1%) |
Z test 4.01 |
<0.001 | |
| Air bronchogram | 48 (44.0%) | 73 (72.3%) |
Z test 4.0 |
<0.001 | |
| Fibrosis with irregular interface, coarse reticular pattern, and parenchymal band | 23 (21.1%) | 63 (62.4%) |
Z test 5.94 |
<0.001 | |
| Pleural effusion | 8 (7.3%) | 13 (12.9%) |
Z test 1.10 |
0.27 | |