. 2022 Nov 19;20:101289. doi: 10.1016/j.ssmph.2022.101289

Table A1.

Association between racial segregation indices and substance use treatment facilities per 100,000 population, county fixed effects and year fixed effects

	All facilities	MAT facilities
$D_{c t}^{B}$	−0.301	−0.212
	(0.384)	(0.218)

$D_{c t}^{H}$	−0.572	−0.600**
	(0.434)	(0.298)

$I n t e r a c t_{c t}^{W B}$	−5.931*	−6.060***
	(3.238)	(2.268)

$I n t e r a c t_{c t}^{B W}$	0.0866	0.0390
	(0.491)	(0.272)

$I n t e r a c t_{c t}^{W H}$	−11.05***	−4.154**
	(2.595)	(1.843)

$I n t e r a c t_{c t}^{H W}$	−0.769	−0.338
	(0.886)	(0.613)

N	9261	9261
$R^{2}$	0.814	0.720

County fixed effects	Yes	Yes
Year fixed effects	Yes	Yes
County and state controls	Yes	Yes

Notes: Standard errors clustered at county level. Outcome data are the number of substance use treatment facilities per 100,000 population calculated from the 2010, 2015, and 2020 National Survey of Substance Abuse Treatment Services directories. Racial segregation indices and population shares calculated from the 5-year 2009, 2014, and 2019 American Community Surveys. County controls include the natural log of county income per capita, county race-specific opioid mortality rates, county median age. State controls include indicators for prescription drug monitoring programs (including “must access”), “pill mill” laws, good samaritan laws, naloxone access laws,. All regressions include county fixed effects and year fixed effects. ***p < 0.01, **p < 0.05, *p < 0.1.