Table 3.

Associations between Meeting Brain Imaging Target Times and Arrival Mode among Patients Arriving Within 2 Hours of Stroke Onset, NCSCC, 2008-2009

	Brain Imaging completed within 25 minutes			Brain Imaging interpreted within 45 minutes
	Risk	RR	95% CI	Risk	RR	95% CI
Crude
EMS with pre-notification	0.55	2.3	(1.8, 2.8)	0.57	1.8	(1.5, 2.1)
EMS without pre-notification	0.34	1.4	(1.1, 1.8)	0.43	1.3	(1.1, 1.7)
Private (ref)	0.25	1		0.32	1
Adjusted*
EMS with pre-notification	0.52	1.9	(1.6, 2.3)	0.53	1.5	(1.3, 1.7)
EMS without pre-notification	0.34	1.2	(1.0, 1.6)	0.43	1.2	(1.0, 1.5)
Private (ref)	0.27	1		0.35	1

RR indicates risk ratio; CI, confidence interval

^*Adjusted for age, sex, race, health insurance, time of day of arrival, weekend arrival, documented history of stroke/TIA, presumptive stroke diagnosis, ambulatory status at admission, patient location at onset, JCPSC certification, teaching hospital, hospital beds