Table 3.

Prehospital delay, EMS and aspirin use during two-years follow-up.

	Experimental	Control
Prehospital delay ┼	317 ED visits (n = 224)§	278 ED visits (n= 169)
Median prehospital delay time (hours)	2.20	2.25
25 percentile	1.18	1.18
75 percentile	4.69	5.28
Mean prehospital delay time (± SD)	4.29 (± 0.34)	5.08 (± 0.69)
Transportation mode §	373 ED visits (n = 305)	334 ED visits (n = 260)
Ambulance/Helicopter: % (n)	63.6 (194)	66.9 (174)
Private car/other: % (n)	58.7 (179)	61.5 (160)
Aspirin use prior to ED arrival §	367 ED visits (n = 259 )	307 ED visits (n =212 )
Yes: % (n)	22.3 (82)	10.1 (31)
No: % (n)	77.7(285)	89.9 (276)

Note:

^┼Prehospital delay time (time from symptom onset to ED arrival) was obtained from patients’ medical records. Due to missing data, sample sizes in prehospital delay time, transportation mode, and aspirin use are not equivalent.

^§n refers to the number of patients in each group