Table 1. Comparison of demographic characteristics and AIDS Drug Assistance Program features of U.S. states represented in study, 2001 and 2009 data.

Characteristic	2001				2009
	All U.S. states*		34 states* in study		All U.S. states*		34 states* in study
	Median	IQR	Median	IQR	Median	IQR	Median	IQR
Demographic variables
Population density (per square mile)	90	42–221	137	63–274	100	43–230	150	66–282
% of population that is of black race	7.2	2.3–15.8	10.9	4.1–19.8	7.6	3.1–16.3	11.5	5.3–19.7
Annual household income (current U.S. dollars, thousands)	51,004	46,473–58,205	51,663	47,095–56,861	49,909	45,455–56,568	49,271	45,036–56,853
% of population living below FPL	10.5	8.5–14.1	11.1	8.5–14.2	13.3	10.9–15.8	13.9	11.7–16.6
State Medicaid HIV spending per capita	N/A	N/A	N/A	N/A	18,757	15,768–22,710	19,621	16,417–23,088
AIDS Drug Assistance Program (ADAP) features
% state contribution to total ADAP budget expenditures	9	0–21	14	3–28	11	0–25	19	5–31
States contributing to total ADAP budget, by percentage (N, %)
0%	N = 15	29%	N = 6	18%	N = 17	33%	N = 8	24%
Less than 20%	N = 22	43%	N = 17	50%	N = 15	29	N = 9	26%
20% or more	N = 14	27%	N = 11	32%	N = 19	37%	N = 17	50%
% of all available antiretroviral drugs on formulary	100	100–100	100	100–100	100	97–100	100	97–100
Financial eligibility threshold as % of FPL	300	230–350	300	281–370	300	300–400	300	300–400
States with waiting list at least once during study (N, %)	-	-	-	-	N = 20	39%	N = 11	32%

^*Including the District of Columbia.

FPL = federal poverty level, IQR = interquartile range, N/A = not available. State demographic variables from annual U.S. Census population estimates and the Current Population Survey [31], [33]. State Medicaid spending from the Kaiser Commission on Medicaid and the Uninsured and the Urban Institute [32]. ADAP features from the National Alliance of State and Territorial AIDS Directors (NASTAD) [15].