Table 3.

Outcome extraction (three categories: Death, Coronary artery bypass graft and Discharge) for the patients in the unstable angina/non-ST-segment elevation myocardial infarction test set

Categories by experts	By system	Death	Coronary artery bypass graft	Discharge	Total
Death		19	1	0	20
Coronary artery bypass graft		0	55	15	70
Discharge		0	12	505	517
Total		19	68	520	607

Each column represents the outcome instances in a predicted category provided by the acquisition system, whereas each row represents the outcome instances in an actual category provided by human experts. Discharge information was missing in 20 cases, leaving a total effective case number of 607.