Table 1

Patient and regional characteristics of EMS-transported patients with suspected cardiac ischaemia from the National EMS Information System database 2011 subgroups (n=198 231)

	Received aspirin (N=90 005)		Did not receive aspirin (N=108 226)
	Number	Per cent	Number	Per cent
Age, years
40–50 (n=37 972)	18 526	49	19 446	51
50–60 (n=49 805)	23 184	47	26 621	53
60–70 (n=41 502)	18 177	44	23 325	56
70–80 (n=33 105)	14 058	42	19 047	58
80–90 (n=28 554)	13 653	48	14 901	52
90–100 (n=7104)	3290	46	3814	54
>100 (n=189)	99	52	90	48
Sex
Male (n=99 205)	45 132	45	54 073	55
Female (n=99 026)	44 873	45	54 153	55
Race/ethnicity
Non-Hispanic white (n=110 328)	47 795	43	62 533	57
Non-Hispanic black (n=25 187)	12 937	51	12 250	49
Hispanic (n=4100)	2288	56	1812	44
Non-Hispanic Asian (n=611)	349	57	262	43
Non-Hispanic Pacific (n=183)	82	45	101	55
Other (n=1259)	640	51	619	49
Missing (n=56 563)	25 914	46	30 649	54
Payment category
Private insurance (n=20 997)	8900	42	12 097	58
Medicare (n=30 767)	13 153	43	17 614	57
Medicaid (n=8190)	4062	50	4128	50
Government (n=1002)	334	33	668	67
No bill (n=3507)	1131	32	2376	68
Work compensation (n=54)	34	63	20	37
Self-pay (n=9357)	4554	49	4803	51
Missing (n=124 357)	57 837	47	66 520	53
Region
North Central (n=53 935)	22 032	41	31 903	59
East (n=87 073)	44 754	51	42 319	49
South Central (n=39 579)	14 727	37	24 852	63
West (n=17 644)	8492	48	9152	52

EMS, Emergency Medical System.