From the clinic to the community: Can health system data accurately estimate population obesity prevalence?

Objective Health system data were assessed for how well they can estimate obesity prevalence in census tracts. Methods Clinical visit data were available from two large health systems (Kaiser Permanente Washington and University of Washington Medicine) in King County, Washington, as were census tract–level obesity prevalence estimates from the Behavioral Risk Factor Surveillance System (BRFSS). The health system data were geocoded to identify...