Table A3.

Sensitivity and specificity values for classification of severe and non-severe COVID-19 based on chest radiographs in the held-out independent test sets by the Inception-v1 models trained with different training sets and batch sizes of 16, 32, and 64. The mean and standard deviation were estimated from the models trained with five random initializations for a given training set and batch size.

Batch Size	Models	Performance Metric	MIDRC	BrixIA	COVIDGR	UMICH
16	M	Sensitivity	0.75 ± 0.06	0.77 ± 0.02	0.77 ± 0.04	0.77 ± 0.05
		Specificity	0.77 ± 0.05	0.73 ± 0.02	0.74 ± 0.04	0.72 ± 0.03
	MB	Sensitivity	0.77 ± 0.04	0.76 ± 0.04	0.75 ± 0.11	0.71 ± 0.02
		Specificity	0.78 ± 0.04	0.77 ± 0.03	0.71 ± 0.06	0.77 ± 0.02
	MBC	Sensitivity	0.78 ± 0.03	0.79 ± 0.01	0.76 ± 0.09	0.77 ± 0.03
		Specificity	0.76 ± 0.05	0.77 ± 0.01	0.76 ± 0.08	0.71 ± 0.03
32	M	Sensitivity	0.78 ± 0.03	0.75 ± 0.05	0.68 ± 0.06	0.71 ± 0.05
		Specificity	0.73 ± 0.03	0.75 ± 0.04	0.72 ± 0.07	0.73 ± 0.02
	MB	Sensitivity	0.76 ± 0.06	0.76 ± 0.04	0.69 ± 0.12	0.71 ± 0.02
		Specificity	0.74 ± 0.08	0.78 ± 0.04	0.78 ± 0.09	0.77 ± 0.02
	MBC	Sensitivity	0.79 ± 0.04	0.76 ± 0.02	0.84 ± 0.04	0.73 ± 0.05
		Specificity	0.77 ± 0.03	0.78 ± 0.02	0.74 ± 0.06	0.76 ± 0.05
64	M	Sensitivity	0.75 ± 0.04	0.66 ± 0.05	0.67 ± 0.11	0.66 ± 0.08
		Specificity	0.73 ± 0.04	0.75 ± 0.05	0.66 ± 0.07	0.69 ± 0.06
	MB	Sensitivity	0.78 ± 0.03	0.75 ± 0.04	0.67 ± 0.11	0.69 ± 0.05
		Specificity	0.77 ± 0.04	0.79 ± 0.03	0.79 ± 0.15	0.77 ± 0.03
	MBC	Sensitivity	0.77 ± 0.03	0.78 ± 0.02	0.69 ± 0.08	0.69 ± 0.02
		Specificity	0.74 ± 0.06	0.74 ± 0.02	0.76 ± 0.04	0.75 ± 0.02