Table 4.

Initial CT data of 160 patients.

Characteristics	Overall (N = 160)	Group 1 (N = 65)	Group 2 (N = 95)	P value
Onset-CT interval (day)	8 (5,11)	5 (2,7)	10 (8,14)	<0.001
Lobes involved	5 (2.25,5)	4 (1,5)	5 (4,5)	<0.001
Segments involved	12 (5,16)	7 (1,15)	14 (9,17)	<0.001
Pulmonary infiltration (number of segments involved)
Location
Peripheral	7 (2,11)	4 (1,10)	8 (4,11)	<0.001
Both	1 (0,5)	0 (0,3)	2 (0,9)	0.002
Central	0 (0,1)	0 (0,1)	0 (0,0)	0.486
Density
GGO	2 (0, 5)	1 (0, 4.5)	2 (0, 5)	0.210
Mixed	5 (1,10)	2 (0,6.5)	7 (2,11)	<0.001
Consolidation	0 (0,1)	0 (0,1)	0 (0,2)	0.051
Form
Patchy	12 (4,16)	5 (1,13)	13 (8,17)	<0.001
Oval	0 (0,0)	0 (0,1)	0 (0,0)	0.001
Radiological score	26 (9.25,42.75)	14 (3,32.5)	31 (19,45)	<0.001
Other Radiological pattern
Air bronchogram	116 (72.5%)	41 (63.1%)	75 (78.9%)	0.023
Centrilobular nodules	3 (1.9%)	0 (0%)	3 (3.2%)	0.149
Tree-in-bud	0 (0%)	0 (0%)	0 (0%)	1.000
Reticular pattern	104 (65.0%)	33 (50.8%)	71 (74.7%)	0.002
Subpleural linear opacity	53 (33.1%)	12 (18.5%)	41 (43.2%)	0.001
Bronchial dilatation	36 (22.5%)	5 (7.7%)	31 (32.6%)	<0.001
Cystic change	9 (5.6%)	3 (4.6%)	6 (6.3%)	0.648
Lymphadenopathy	5 (3.1%)	3 (4.6%)	2 (2.1%)	0.372
Pleural effusion	19 (11.9%)	5 (7.7%)	14 (14.7%)	0.177

GGO: ground glass opacity.