Table 3.

Sample data elements of data sources

Data Element Type	Data Source
	CHOICE	DCI	USRDS Registry	Cleveland Clinic CKD Registry
Demographics	Present	Present	Present	Present
Outpatient Medications	Medical records	Medical records	Medicare Part D prescription drug data Claims 2006-2009	Medical records
Facility/Intravenous Medications	Medical records and Claims	Medical records and Claims	Claims	Medical records and Claims
Laboratory Data	Clinical Data	Clinical Data	Not Available	Clinical Data
Quality of Life	Detailed Disease Specific and Global	Global	Not Available	Not Available
Co-morbidity	Disease Specific Scale	Medical Records	Claims	Medical Records
Hospitalizations	Medical Records	Medical Records	Claims	Medical Records
CVD Events	Adjudicated from medical records, claims	Claims	Claims	Not Available
Deaths	Medical records, Medicare enrollment, National Death Index	Medicare enrollment, National Death Index	Medicare enrollment, National Death Index	Social Security Death Index