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Table 2 Comparison of particular characteristics between the groups on peak CT imaging

From: Predicting lung fibrosis in post-COVID-19 patients after discharge with follow-up chest CT findings

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