Table 1.

Types of electronic health record data^* in the Colorado Health Observation Regional Data Service (CHORDS) and their relevance to chronic conditions surveillance, 2017.

Data type	Description	Relevance	Example
Patient demographics	Age, gender, race/ethnicity, primary language	Examines prevalence, management, and disparities in chronic conditions by individual characteristics	What percent of children are diagnosed with asthma?
Geographic location and demographics	County and census tract of residence, American Community Survey measures	Examines how differences in social and environmental characteristics within a region are associated with chronic conditions	How is neighborhood poverty associated with treatment adherence for diabetes?
Encounters	Date, and encounter type	Examines how frequency and timing of patient visits affect prevention and management of chronic conditions	How frequently are adults with depression seen?
Diagnoses and procedures	ICD-9/10 diagnosis code, date of diagnosis, procedure type and date	Calculates prevalence of diagnosed chronic health conditions and related procedures	What percent of adults have been diagnosed with high blood pressure?
Laboratory results	Test type, date of test, result	Captures undiagnosed chronic conditions and examine screening rates	What percent of Denver adults have been tested for hepatitis C virus?
Pharmacy	Outpatient prescription orders and dispenses	Examines relationship between diagnosis of chronic conditions and pharmaceutical treatment for these conditions	What percent of adults with high cholesterol are prescribed cholesterol-lowering medication?
Vital signs	Objectively-measured height, weight, blood pressure	Adds to diagnostic information to examine relationships of vital signs to chronic condition prevalence	What percent of adults are overweight or obese? What percent of adults with hypertension are well controlled?
Social History	Self-reported data on tobacco use and exposure, alcohol/drug use	Examines the relationship between health behaviors and chronic conditions	What percent of children are exposed to second hand smoke?

^*Note: Table is organized to the common data model (CDM); only a portion of the 17 CDM tables are presented here.