Table 3. Categorization of Demographic Covariates for Use in Hierarchical Models in Ranking Counties on Population Health Measures.

Measure	Category 1 (Low)	Category 2	Category 3	Category 4 (High)
% Female	<45%	45%–50%	50%–55%	>55%
% Younger than 18	<20%	20%–23.5%	23.5%–27%	>27%
% Older than 64	<10%	10%–15%	15%–20%	>20%