|Example: Arkansas counties by quartiles|
The factor rankings are based 30 percent on health behaviors (tobacco and alcohol use, diet and exercise, sexual activity), 20 percent on clinical care (access to care and quality of care), 40 percent on social and economic factors (education, employment, income, family and social support, community safety) and 10 percent on physical environment (air and water quality and housing and transit).
The factors used in the rankings have changed somewhat over the years, some statistical modeling is involved, and statistical differences among closely ranked counties are so small that they may not be significant. Thus, the rankings should be viewed more as a general categorization of a county's health status than be used to make specific comparisons with counties that are relatively close in the rankings. To emphasize that, the rankings maps group counties in quartiles, or fourths of the whole. Complete results for any county and state can be found here.