Comparison of Chest Computed Tomography (CT) Imaging Patterns and Severity among COVID-19 Patients during the First and Fourth Waves in Addis Ababa, Ethiopia

Table 5

Atypical chest computed tomography (CT) features among COVID-19 patients with positive CT findings.

Variables	1^st wave	4^th wave	value
	Frequency (%), n = 99	Frequency (%), n = 69
Mediastinal lymphadenopathy	12 (12.12%)	1 (1.45%)	0.024
Nodular opacity	3 (3.03%)	17 (24.6%)	<0.001
Pleural effusion	11 (11.11%)	33 (47.8%)	<0.001
Tree in bud opacity	0 (0%)	5 (7.24%)