Table 2.

Descriptive statistics of potential indicator variables for acute HCV infection and results of regression modeling

Indicators	Descriptive Statistics1				Univariable		Multivariable2
	Median	Mean	First quartile	Third quartile	RR	P-value	Regression coefficient	Standardized regression coefficient	sRR	P-value
Drug overdose deaths per 100,000 pop.	11.7	13.6	5.8	18.4	1.024	<0.0001	0.016	0.116	1.210	<0.0001
Prescription opioid sales per 10,000 pop.	7.0	7.6	5.2	9.2	1.075	<0.0001	0.024	0.052	1.090	0.0115
Mental health providers per 100,000 pop.	75.6	110.7	27.5	151.6	0.999	0.1800
Percent of pop. without insurance coverage	14.6	15.1	11.1	18.4	1.021	0.0271
Percent of households with access to vehicle	94.2	93.7	92.4	95.6	1.023	0.0029
Percent of pop. without high school diploma	18.8	19.9	13.8	24.8	1.008	0.1103
Per capita income, $	22,715	23,439	19,847	25,942	0.057	<0.0001	−2.181	−0.125	0.810	<0.0001
Pop. per square mile, log base 10	46.8	46.7	18.2	123.0	0.639	<0.0001
Percent of pop. living in poverty	15.8	16.4	12.0	19.9	1.027	<0.0001
Percent of pop. of non-Hispanic white race/ethnicity	85.7	78.7	67.9	94.0	1.028	<0.0001	0.027	0.314	1.680	<0.0001
Percent of pop. unemployed	8.6	8.8	6.4	10.9	1.053	<0.0001	0.038	0.082	1.140	0.0095
NCHS Urban/Rural continuum classification	5.0	4.6	3.0	6.0	1.179	<0.0001
Buprenorphine prescription capacity by DATA 2000 waiver per 10,000 pop.	7.9	24.9	0.0	35.5	1.001	0.0664	0.002	0.046	1.080	0.0095
	N	%
Access to highway/interstate within 5 miles (Y/N)	3722	65.28%			0.679	0.0111
Presence of urgent care facility (Y/N)	2186	38.30%			0.755	<0.0001

Note. Pop. Population; RR risk ratio; sRR standardized risk ratio

¹The sample size for the descriptive statistics and univariable regression models is n=2,970 counties (number of counties with acute HCV data) except for drug overdose deaths (n=2,704).

²The final multivariable model includes drug overdose deaths per 100,000 population, therefore the sample size is n=2,704.