Table 2 Comparison of initial and follow-up CT between the two follow-up groups
Parameter | Complete radiological resolution on follow-up CT (n = 46; 56.8%) | Residual lung findings on follow-up CT (n = 35; 43.2%) | p value |
|---|---|---|---|
Laterality of lung involvement on initial CT | |||
Bilateral | 33 (71.8%) | 29 (82.8%) | 0.2962 |
Unilateral | 13(28.2%) | 6 (17.2%) | |
Number of lobes involved on initial CT | 3 ± 1.3 | 3.4 ± 1.4 | 0.6351 |
Percentage of total lung involvement on initial CT (CT severity score) | 8.1 ± 2.3 | 12.4 ± 3.2 | 0.03843 |
Dominant pulmonary opacity on initial CT | |||
Pure GGO | 34 (73.9%) | 24 (68.6%) | 0.6266 |
Consolidation | 4 (8.7%) | 6 (17.1%) | 0.3155 |
Mixed pattern | 8 (17.4) | 5 (14.3%) | 0.7686 |
Dominant pulmonary opacity on follow-up CT | |||
GGO | N/A | 16 (45.7%) | N/A |
Linear/curvilinear parenchymal bands | 9 (25.7%) | ||
Mixed pattern of GGO and parenchymal bands | 6 (17.2%) | ||
Interlobular septal thickening | 4 (11.4%) | ||
Bronchiectasis | 6 (17.2%) | ||
Time lapse between initial and follow-up CT (Mean days ± SD) | 101.4 ± 9.8 | 99.6 ± 8.7 | 0.4737 |