Table 2.

Association Between Ambulance Diversion of the Nearest ED And AMI Mortality Rates

	Nearest ED not on diversion on the day of admission		Nearest ED's level of exposure to diversion on the day of admission
			<6 hr		6-12 hours		≥12 hours
	Unadjusted mortality rate		Regression adjusted rate difference compared to control group
	(N)	%		[95% CI]		[95% CI]		[95% CI]
7-day mortality	(305)	9	0.41	[−0.95,1.77]	0.02	[−1.63,1.66]	1.45	[−0.69,3.58]
30-day mortality	(545)	15	0.19	[−1.59,1.96]	1.22	[−0.83,3.26]	3.24*	[0.60,5.88]
90-day mortality	(762)	22	0.21	[−1.74,2.15]	0.17	[−1.94,2.28]	2.89*	[0.13,5.64]
9-month mortality	(980)	28	0.34	[−1.76,2.45]	−1.13	[−3.55,1.28]	2.93*	[0.15,5.71]
1-year mortality	(1034)	29	0.16	[−1.91,2.23]	−1.28	[−3.73,1.18]	3.04*	[0.33,5.75]
Sample size								11625

Significant at +p<0.10

^*p<0.05

**p<0.01