Table 3.

Estimates from Main- and Sensitivity-Analyses of Racial Residential Segregation, Proportional Composition and per Capita Syringe and Naloxone Distribution.

	Syringe Distribution per 100k County Population				Naloxone Distribution per 100k County Population
	aIRR	95% Confidence Limits		Pr > |Z|	aIRR	95% Confidence Limits		Pr > |Z|
Divergence Index
Main Analysis	0.67	0.54	0.83	0.000	0.99	0.73	1.35	0.954
Sensitivity Analysis, 25th pctl	0.66	0.54	0.81	<.0001	0.95	0.71	1.27	0.745
Dissimiliarty Index NH Black
Main Analysis	0.84	0.58	1.21	0.348	0.64	0.33	1.25	0.196
Sensitivity Analysis, 25th pctl	0.82	0.58	1.16	0.268	0.63	0.35	1.12	0.116
Dissimiliarty Index Hispanic
Main Analysis	0.65	0.48	0.88	0.005	0.82	0.50	1.33	0.419
Sensitivity Analysis, 25th pctl	0.66	0.49	0.89	0.006	0.80	0.51	1.25	0.326
% NH Black
Main Analysis	0.69	0.49	0.97	0.031	1.07	0.71	1.60	0.754
Sensitivity Analysis, 25th pctl	0.71	0.51	0.97	0.033	1.04	0.70	1.54	0.852
% NH Asian
Main Analysis	0.89	0.79	1.01	0.066	0.92	0.81	1.05	0.204
Sensitivity Analysis, 25th pctl	0.89	0.80	0.99	0.038	0.90	0.80	1.02	0.103
% NH Other
Main Analysis	0.86	0.65	1.13	0.284	0.60	0.49	0.74	<.0001
Sensitivity Analysis, 25th pctl	0.93	0.74	1.15	0.488	0.77	0.63	0.94	0.011
% Hispanic
Main Analysis	1.01	0.99	1.02	0.424	0.97	0.95	0.98	0.000
Sensitivity Analysis, 25th pctl	1.00	0.99	1.02	0.641	0.97	0.95	0.98	<.0001

Pctl = percentile; aIRR = adjusted incident rate ratio; LCL=95% lower confidence limit; UCL=95% upper confidence limit; NH = non-Hispanic; Each racial residential segregation measure and the proportional racial composition measure was modeled separately. Each model adjusted for urbanicity, the percent of county residents that voted for the Republican presidential candidate in 2020, and the rate of opioid-related overdose mortality.