Table 2.

Image Characteristic of baseline HRCT.

Image Characteristics	All patients (n = 52)	RD group (n = 18)	NRD group (n = 25)	P value
Transverse distribution				.385
Peripheral	33 (76.7%)	15 (83.3%)	18 (72.0%)
Central and peripheral	10 (23.3%)	3 (16.7%)	7 (28.0%)
Craniocaudal distribution				.653
Upper lung predominant	3 (7.0%)	1 (5.6%)	2 (8.0%)
Lower lung predominant	22 (51.2%)	8 (44.4%)	14 (56.0%)
No craniocaudal predominance	18 (41.9)	9 (50.0%)	9 (36.0%)
Sagittal distribution				.090
Anterior lung predominant	0 (0.0%)	0 (0.0%)	0 (0.0%)
Posterior lung predominant	32 (74.4%)	11 (61.1%)	21 (84.0%)
No Sagittal predominance	11 (25.6%)	7 (38.9%)	4 (16.0%)
Ground glass opacity (GGO)	42 (97.7%)	18 (100%)	24 (96%)	.391
GGO score	7 (10)	8 (12)	6 (11)	.951
Consolidation	20 (46.5%)	8 (44.4%)	12 (48.0%)	.818
Consolidation score	1 (2)	1 (1.25)	1 (3.5)	.433
Centrilobular nodules	0 (0%)	0 (0%)	0 (0%)	–
Traction bronchiectasis	2 (4.7%)	1 (5.6%)	1 (4.0%)	.811
Mediastinal lymphadenopathy	2 (4.7%)	0 (0.0%)	2 (8.0%)	.219
Pleural effusions	0 (0%)	0 (0%)	0 (0%)	–
Reticulation	3 (7.0%)	3 (16.7%)	0 (0.0%)	.034
Tree-in-bud sign	0 (0%)	0 (0%)	0 (0%)	–
Microvascular dilation sign	28 (65.1%)	13 (72.2%)	15 (60.0%)	.407
Fibrotic streaks	26 (60.5%)	8 (44.4%)	18 (72.0%)	.068
Subpleural line	7 (16.3%)	1 (5.6%)	6 (24%)	.106
Time from symptom onset to CT2†	14 (6)	12 (4)	17 (6)	.000∗
Fibrotic changes on follow-up CT	24 (55.8%)	11 (61.1%)	13 (52%)	.553

GGO score, Consolidation score, Days from symptom onset to CT2^† are presented as median (interquartile range: 25th percentile – 75th percentile), others are presented as n (%).

^∗P < .05.

^†CT2 is the first routine CT evaluation during hospitalization. All radiological deterioration occurred in CT2.

NRD = non-radiological deterioration, RD = radiological deterioration.