Table S2.

Adjusted Odds Ratios (AORs) and 95% Confidence Intervals (CIs) of EMS Stroke Prenotification with Census Tract Urban-Rural and Socioeconomic Status Stratified by Stroke Screen Interpretation

	Positive Stroke Screen (N=5,484)		Non-Conclusive Stroke Screen (N=1,149)		Negative Stroke Screen (N=2,894)
	AOR	(95% CI)	AOR	(95% CI)	AOR	(95% CI)
(a) Base model *
Urban (ref)	1	---	1	---	1	---
Suburban	1.06	(0.94–1.21)	0.76	(0.57–1.03)	0.44	(0.34–0.57)
Rural	0.77	(0.62–0.94)	0.42	(0.25–0.73)	0.31	(0.19–0.50)
High SES (ref)	1	---	1	---	1	---
Medium SES	1.05	(0.91–1.21)	0.99	(0.68–1.45)	0.77	(0.62–0.95)
Low SES	0.91	(0.78–1.06)	0.79	(0.53–1.16)	0.64	(0.50–0.83)
(b) Fully-adjusted model †
Urban (ref)	1	---	1	---	1	---
Suburban	1.05	(0.91–1.20)	0.82	(0.58–1.15)	0.62	(0.47–0.82)
Rural	0.76	(0.61–0.96)	0.37	(0.19–0.70)	0.48	(0.29–0.81)
High SES (ref)	1	---	1	---	1	---
Medium SES	1.01	(0.87–1.18)	0.89	(0.58–1.38)	0.68	(0.53–0.87)
Low SES	0.86	(0.73–1.02)	0.68	(0.43–1.08)	0.51	(0.38–0.69)

^*Base model includes census tract rurality and SES

^†Fully-adjusted model includes census tract rurality and SES, age group, gender, race/ethnicity, duration of symptoms, weekend, time of day, stroke dispatch complaint, and EMS provider primary impression