The Colorado Department of Public Health and Environment has developed community-level estimates for a set of important health condition and risk behavior indicators. These four-year estimates (2013-2016) have been produced for each census tract in the State of Colorado based on modeled survey data collected in the Colorado Behavioral Risk Factor Surveillance System (BRFSS) and incorporating population, race, gender, and age estimates for each census tract from the American Community Survey. Click here to watch a March 2016 Webinar introducing the estimates and maps. For an explanation of the overall statistical modeling process please click here, or see the Methods and Diagram section below.
CDPHE's Community Level Estimates are output from statistical models used to generate health condition and risk behavior estimates for smaller geographies than traditional surveillance systems report. The estimates are produced using a multilevel model that incorporates individual Colorado Behavioral Risk Factor Surveillance System (BRFSS) survey responses in addition to socio-demographic and contextual information from the U.S. Census (American Community Survey). The individual survey responses related to a health condition or risk behavior from the Colorado BRFSS are nested within geographic boundaries (counties) where both individual characteristics (demographic) as well as sociodemographic characteristics can be used to model the probability of having a health condition or risk behavior at the census tract geography.
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The estimates are presented to users through a web-based searchable map and accompanying data table. Users of the web-based map can use traditional panning and zooming tools or query the map by county name, city name, zip code, or school district name using the Search tool located above the map. Data may be downloaded from each specific map in several formats including XLSX, shapefile, Google Earth KMZ, and JSON formats.
The estimates are displayed in both the map and data table using point estimate values for each census tract and displayed using a Quintile range. The high and low value for each color on the map is calculated based on dividing the total number of census tracts in Colorado (1249) into five groups based on the total range of estimates for all Colorado census tracts. Each Quintile range represents roughly 20% of the census tracts in Colorado. No estimates are provided for census tracts with a known population of less than 50. These census tracts are displayed in the map as "No Est, Pop < 50."