Table 2.

Radiological findings of COVID‐19 and influenza patients

	Total (n = 326)	COVID‐19 (n = 211)	Influenza (n = 115)	p Value
Lung involvement
Unilateral	69 (21.2%)	44 (20.9%)	25 (21.7%)	.852
Bilateral	232 (71.2%)	152 (72.0%)	80 (69.6%)	.638
Predominant distribution
Central	35 (10.7%)	24 (11.4%)	11 (9.6%)	.614
Peripheral	130 (39.9%)	91 (43.1%)	39 (33.9%)	.105
Central + Peripheral	141 (43.3%)	83 (39.3%)	58 (50.4%)	.053
Location of lesions
Left upper lobe	121 (37.1%)	80 (37.9%)	41 (35.7%)	.686
Left lower lobe	207 (63.5%)	131 (62.1%)	76 (66.1%)	.473
Right upper lobe	122 (37.4%)	75 (35.5%)	47 (40.9%)	.343
Right middle lobe	220 (67.5%)	140 (66.4%)	80 (69.6%)	.554
Right lower lobe	250 (76.7%)	157 (74.4%)	93 (80.9%)	.187
Number of lobes with lesions
0	25 (7.7%)	15 (7.1%)	10 (8.7%)	.607
1	30 (9.2%)	18 (8.5%)	12 (10.4%)	.570
2	66 (20.2%)	49 (23.2%)	17 (14.8%)	.070
3	89 (27.3%)	55 (26.1%)	34 (29.6%)	.498
4	105 (32.2%)	68 (32.2%)	37 (32.2%)	.992
5	18 (5.5%)	6 (2.8%)	12 (10.4%)	.004
CT pattern
GGO	124 (38.0%)	87 (41.2%)	37 (32.2%)	.108
Consolidation	73 (22.4%)	55 (26.1%)	18 (15.7%)	.031
GGO + Consolidation	99 (30.4%)	54 (25.6%)	45 (39.1%)	.011
Crazy paving pattern	58 (17.8%)	47 (22.3%)	11 (9.6%)	.004
Linear opacities	187 (57.4%)	128 (60.7%)	59 (51.3%)	.103
Rounded opacities	102 (31.3%)	80 (37.9%)	22 (19.1%)	<.001
Air bronchogram	78 (23.9%)	63 (29.9%)	15 (13.0%)	<.001
Nodules	45 (13.8%)	34 (16.1%)	11 (9.6%)	.101
Halo sign	22 (6.7%)	17 (8.1%)	5 (4.3%)	.252
Tree‐in‐bud sign	35 (10.7%)	29 (13.7%)	6 (5.2%)	.018
Interlobular septal thickening	67 (20.6%)	51 (24.2%)	16 (13.9%)	.029
Bronchiolar wall thickening	86 (26.4%)	71 (33.6%)	15 (13.0%)	<.0001
Cavitation	10 (3.1%)	6 (2.8%)	4 (3.5%)	.746
Pleural effusion	52 (16.0%)	33 (15.6%)	19 (16.5%)	.835
Pericardial effusion	13 (4.0%)	8 (3.8%)	5 (4.3%)	.776

Abbreviation: COVID‐19, coronavirus disease 2019.