Table 2.

CT features of COVID-19 patients with two consecutive negative RT-PCR tests after treatment.

Feature	Moderate group n = 39	Severe/critical group n = 7	P value
Number
Unique	3 (8%)	0 (%)	–
Multiple	36 (92%)	7 (100%)	1.0
Distribution
Peripheral	33 (85%)	2 (29%)	0.005
Peripheral involving central	6 (15%)	5 (71%)	0.005
Lobes involved
Single lobe	9 (23%)	0 (0%)	–
2–4 lobes	13 (33%)	0 (0%)	–
5 lobes	17 (44%)	7 (100%)	0.01
Density
Ground glass opacity	38 (97%)	7 (100%)	1.0
Mixed ground glass opacity	16 (41%)	7 (100%)	0.009
Consolidation	4 (10%)	4 (57%)	0.012
Shape
Circular	18 (46%)	3 (43%)	1.0
Fan-shaped	19 (49%)	7 (100%)	0.014
Irregular	34 (87%)	7 (100%)	1.0
Pulmonary fibrosis	22 (56%)	5 (71%)	0.682
Pulmonary interstitium thickening	28 (72%)	7 (100%)	0.171
Linear	5 (13%)	1 (14%)	1.0
Reticular	23 (59%)	6 (86%)	0.043
Other findings
Air bronchogram	1 (3%)	4 (57%)	0.003
Vascular enlargement	30 (77%)	7 (100%)	0.316
Bronchial wall thickening	3 (8%)	2 (29%)	0.160
Bronchiectasis	5 (13%)	3 (43%)	0.089
Pleural thickening	19 (49%)	6 (86%)	0.106
Pleural adhesion	12 (31%)	5 (71%)	0.083
Pleural effusion	1 (3%)	3 (43%)	0.009
Total CT score
0–5	29 (74%)	0 (0%)	–
6–10	8 (21%)	2 (29%)	0.636
11–15	0 (%)	1 (14%)	–
16–20	2 (5%)	4 (57%)	0.003