Table 1.

EHR data types, examples, number of unique variables and number of grouped variables

Data Type	Examples	Number of Unique Variables	Number of Grouped Variables
Diagnoses*	ICD-9 codes (from outpatient visits and problem lists treated separately).	12616	189
Medications†	Beta blockers, loop diuretics, etc.	3952	631
Labs‡	Cholesterol, glucose, eGFR, etc.	2336	-
Hospitalization§	ICD-9 codes associated with admission	7071	189
Demographics and Health Behaviors	Age, Sex, Race/Ethnicity, smoking, alcohol use	5	-
Cardiovascular Imaging Orders#	2D echo, trans esophageal echo, stress echo, etc.	18	-
Vitals‡	Pulse, systolic blood pressure, diastolic blood pressure, height, weight, temperature	6	-
Framingham HF Signs and Symptoms	Positive and negative mentions of acute pulmonary edema, ankle edema, dyspnea on ordinary exertion, paroxysmal nocturnal dyspnea, etc.	28	-

^*ICD-9 codes from outpatient visits and problem lists are treated separately.

^†Normalized drug names, ignoring the dosing information, were used.

^‡The labs and vitals data types contain information about the test order and the numerical result of the test.

^§Primary and secondary ICD-9 codes associated with the hospital admission were used.

^#The imaging order type, associated ICD-9 codes, and any LVEF values were used.