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 3

Comparison of chest computed tomography (CT) finding of COVID-19 patients during the 1^st and 4^th waves COVID in Addis Ababa city.

Variables	1^st wave	4^th wave	value
	Frequency (%)	Frequency (%)
Chest CT protocols			<0.001
Chest angiography	61 (61%)	50 (40%)
CT without contrast	26 (26%)	30 (30%)
CT with contrast	13 (13%)	20 (20%)
CT findings
Positive	99 (99%)	69 (69%)	<0.001
Unremarkable	1 (1%)	31 (31%)