The estimated percent of the population that is obese or physically inactive was obtained from the 2011 Colorado Behavioral Risk Factor Surveillance System (BRFSS) survey. Because of sample size variation in where the survey was conducted and how many survey responses were received, survey responses were geographically organized into one of 21 Colorado Health Statistics Regions. The quartile classification scheme was used to group, rank, and display survey responses corresponding with the estimated obesity and physical inactivity prevalence within each health statistics region. This scheme divides each region's estimated prevalence into one of four classes creating roughly the same number of health statistics regions within each class. In addition, the statistical reliability of each region's estimated prevalence is portrayed on the map by comparing the 95% confidence interval for each region's estimated prevalence to the 95% confidence interval for the overall estimated prevalence (for Colorado). Dark red diagonal lines depict region's that are statistically above the state prevalence. Green vertical lines depict region's that are statistically lower than the state prevalence. All other regions have a prevalence that is not statistically different than the state prevalence, using the 95% confidence intervals.