Table 5.

Case-level data source distribution of the classification dataset by hospital.

Hospital name	Training set			Testing set
	Positive cases	Negative cases		Positive cases	Negative cases
		Healthy	Other diseases		Healthy	Other diseases
Beijing Tsinghua Changgung Hospital	4	43	183	1	10	48
Wuhan No.7 Hospital	150	15	88	38	6	32
Zhongnan Hospital of Wuhan University	113	12	72	28	5	27
Tianyou Hospital	319	0	0	59	0	0
Wuhan’s Leishenshan Hospital	132	0	0	33	0	0
Total	718	70	343	159	21	107