Chest CT scan findings in patients with MAS and COVID-19
| Chest CT scan findings | MAS | COVID-19 | P value |
| GGOs, n (%) | 6 (60) | 47 (100) | 0.028 |
| Apical, n (%) | 3 (30) | 31 (65.6) | 0.006 |
| Middle, n (%) | 6 (60) | 42 (89.3) | 0.149 |
| Basal, n (%) | 5 (50) | 45 (95.7) | 0.022 |
| Bilateral, n (%) | 5 (50) | 46 (97.8) | 0.009 |
| Peripheral, n (%) | 5 (50) | 45 (95.7) | 0.014 |
| Extension of GGOs, mean±SD (cm3) | 1295.96±572.36 | 1529.80±448.13 | 0.336 |
| Extension of GGOs, mean±SD (%) | 39.39±16.19 | 35.80±12.59 | 0.561 |
| Parenchymal consolidation, n (%) | 8 (80) | 29 (61.7) | 0.399 |
| Apical, n (%) | 0 (0) | 11 (23.4) | 0.005 |
| Middle, n (%) | 6 (60) | 19 (40.4) | 0.429 |
| Basal, n (%) | 7 (70) | 23 (48.3) | 0.355 |
| Bilateral, n (%) | 4 (40) | 23 (48.3) | 0.867 |
| Peripheral, n (%) | 2 (20) | 20 (42.5) | 0.999 |
| Extension of consolidation, mean±SD (cm3) | 227.26±65.91 | 353.31±122.19 | 0.014 |
| Extension of consolidation, mean±SD (%) | 7.15±3.14 | 8.43±4.43 | 0.477 |
| Septal thickening, n (%) | 7 (70) | 39 (82.9) | 0.655 |
| Intralobular, n (%) | 6 (60) | 27 (57.4) | 0.999 |
| Interlobular, n (%) | 7 (70) | 38 (80.8) | 0.759 |
| Bronchovascular thickening, n (%) | 9 (90) | 33 (70.2) | 0.237 |
| Traction bronchiectases, n (%) | 1 (10) | 6 (12.8) | 0.999 |
| Pleural effusion, n (%) | 4 (40) | 6 (12.8) | 0.192 |
| Hylar lymphadenopathy, n (%) | 5 (50) | 30 (63.8) | 0.653 |
| Cardiomegaly, n (%) | 3 (30) | 14 (29.8) | 0.999 |
GGO, ground-glass opacity; MAS, macrophage activation syndrome.