Table 4.

CT image characteristics of the two respiratory viral pneumoniae groups.

CT image characteristics	COVID-19 group (n = 15)	Influenza A group (n = 18)	chi-square-value	p-value
Lung lobe
Left upper lobe (yes/no)	10/5	3/15	8.58	0.03*
Left lower lobe (yes/no)	9/6	13/5	0.55	0.46
Right upper lobe (yes/no)	9/6	2/16	8.8	0.03*
Right middle lobe (yes/no)	10/5	3/15	8.57	0.03*
Right lower lobe (yes/no)	10/5	12/6	0	1
Lung periphery (yes/no)	13/2	16/2	0.38	0.85
Number of lesions
Single lesion (yes/no)	2/13	3/15	0.71	0.79
Two lesions (yes/no)	2/13	2/16	0.38	0.85
Above two lesions (yes/no)	11/4	12/6	0.17	0.68
CT signs
Nodular (yes/no)	5/10	3/15	1.24	0.27
Ground-glass opacity (yes/no)	14/1	18/0	–	0.46
Grid-form shadow (yes/no)	10/5	5/13	4.99	0.025*
Fibrotic streaks (yes/no)	12/3	10/8	2.2	0.14
Tree-in-bud (yes/no)	6/9	4/14	1.22	0.27
Air-bronchogram (yes/no)	7/8	3/15	3.48	0.06
Mediastinal lymphadenectasis (yes/no)	1/14	1/17	0.18	0.89
Pleurorrhea (yes/no)	1/14	1/17	0.18	0.89
Pleural thickening (yes/no)	7/8	6/19	0.61	0.43

n, number; CT, computed tomography; COVID-19, Coronavirus disease 2019;

^*, Statistically significant.