Table 3.

Augmented images for training in each group (N=31,940).

Data source and group		Augmented images for training, n (%)
WKUHxa
	COVID-19b pneumonia	3370 (10.6)
	Other pneumonia	10,860 (34.0)
	Nonpneumonia and normal lung	7890 (24.7)
	Lung cancer	3550 (11.1)
CNUHc
	COVID-19 pneumonia	5380 (16.8)
SIRMd
	COVID-19 pneumonia	800 (2.5)

^aWKUH: Wonkwang University Hospital.

^bCOVID-19: coronavirus disease

^cCNUH: Chonnam National University Hospital.

^dSIRM: Italian Society of Medical and Interventional Radiology.