Table I.

Structured Variable Categories, Examples, Number Of Unique Variables, And Aggregation Methods.

Variable Category	Example Variables	# of Variables	Aggregation Method
Clinical Diagnosis	Diabetes, Cardiac disorders, etc.	18,569	count
Clinical Measures	Pulse, Systolic blood pressure, etc.	6	mean
Labs	Cholesterol, Serum Glucose, etc.	2,336	mean
Medication Reconciliation	Beta Blockers, Loop Diuretics, etc.	1,250	count
Prescription Order	Furosemide, digoxin, etc.	3,952	count
Imaging Order	Echo orders, etc.	18	count
Hospitalization	The ICD-9 associated with the hospitalization.	7,304	count