Table 2.

Model performance for ascites and image location feedback prediction.

	Validation set	Test set
By frame	(n = 6,118)	(n = 5,456)
Ascites prediction
Accuracy	0.961	0.967
Sensitivity	0.976	0.985
PPV	0.947	0.949
Specificity	0.947	0.913
Feedback prediction
Accuracy	0.941	0.941
By 1-s majority voting	(n = 309)	(n = 500)
Ascites prediction
Accuracy	0.997	0.998
PPV	0.993	0.996
Sensitivity	1	1
Specificity	0.994	0.996

PPV, Positive predictive value.