Table 2.

Patient‐ and Hospital‐Level Characteristics Associated With EMS Prenotification

	Adjusted Ratio	95% Confidence Interval	P
Age (per 10 y)	0.98	0.98–0.99	0.002
Female (vs male)	0.99	0.98–1.00	0.03
Race/ethnicity (reference non‐Hispanic white)
Black	0.94	0.92–0.97	<0.0001
Hispanic	1.00	0.98–1.03	0.81
Asian	0.97	0.93–1.01	0.11
Other	0.89	0.83–0.96	0.003
Medical history
Atrial fibrillation/flutter	1.05	1.03–1.06	<0.0001
Previous stroke/TIA	0.98	0.96–0.99	0.0007
Diabetes mellitus	0.96	0.95–0.97	<0.0001
Peripheral vascular disease	0.94	0.92–0.97	<0.0001
Annual tPA volume (reference ≥21 patients/y)
0–10	0.77	0.61–0.96	0.02
11–20	1.12	0.85–1.47	0.43
Academic center	0.65	0.56–0.75	<0.0001
Region (reference Northeast)
West	2.04	1.63–2.55	<0.0001
South	1.29	1.07–1.55	0.007
Midwest	1.70	1.39–2.07	<0.0001