Table 1.

Study Population Characteristics during Final Measurement Period (January–June 2015)

Characteristic (%)	Received SBI Screening, N = 4,005	Did Not Receive SBI Screening, N = 82,808	p‐Value[Link]
Age (mean)	34.8	35.5	.002
Female	69.6	70.3	.359
Pregnant	14.1	11.0	<.001
White	72.9	70.0	<.001
Black	3.7	4.5	.013
Hispanic	10.5	11.1	.214
Other race or ethnicity	5.3	6.6	.001
Unknown race or ethnicity	7.7	7.7	.958
Rural	39.4	42.4	<.001
History of alcohol or drug Dx	15.9	10.3	<.001
Health comorbidities	83.7	83.1	.326
PCPs per capitaa	0.1	0.1	.478
Specialists per capitaa	0.1	0.1	.048
Institutionalizeda	1.0	1.0	.014
Below high school educationa	4.6	4.5	<.001
Linguistically isolated householda	13.9	13.8	.221
Income below poverty levela	14.9	14.6	<.001
Median household incomea	48,971	49,564	<.001

Note: Tests of statistical significance were performed using Welch two‐sample t‐tests (for continuous variables) and two‐sample tests for equality of proportions with continuity correction (for indicator variables).

^aDenotes area‐level indicator.