Table 2.

Treatment Delay and 1‐Year Mortality in Patients With ST‐Segment Elevation Myocardial Infarction Treated With Primary PCI

Patient Group	Delay to PCI (Minutes)	Sample Size	Unadjusted Event Rate (%)	Unadjusted Hazard Ratio (95% CI)	Adjusted Hazard Ratio (95% CI)
FMC‐to‐PCI, entire cohort	Time as a continuous variable 0 to 360 minutes	13 790	8.6	1.06 (1.03 to 1.09)*	1.06 (1.04 to 1.09)*
	0 to 30	2237	7.0	1.00	1.00
	31 to 60	3557	7.2	1.02 (0.84 to 1.25)	1.08 (0.88 to 1.33)
	61 to 90	3238	9	1.29 (1.06 to 1.56)	1.26 (1.03 to 1.55)
	91 to 120	1934	9.9	1.43 (1.16 to 1.77)	1.41 (1.14 to 1.76)
	121 to 360	2824	10.4	1.51 (1.24 to 1.83)	1.51 (1.23 to 1.86)
FMC‐to‐PCI, patients with a pre‐hospital ECG	Time as a continuous variable 0 to 360 minutes	7053	8.6	1.08 (1.04 to 1.13)*	1.05 (1.01 to 1.10)*
	0 to 30	520	5	1.00	1.00
	31 to 60	2379	7.1	1.42 (0.94 to 2.15)	1.34 (0.88 to 2.05)
	61 to 90	2042	9.5	1.94 (1.29 to 2.92)	1.57 (1.03 to 2.41)
	91 to 120	1015	10.2	2.10 (1.37 to 3.23)	1.61 (1.03 to 2.53)
	121 to 360	1097	10.4	2.18 (1.42 to 3.33)	1.71 (1.10 to 2.67)
Symptom‐to‐PCI, entire cohort	Time as a continuous variable 0 to 480 minutes	11 489	8.3	1.06 (1.02 to 1.10)*	1.05 (1.01 to 1.09)*
	0 to 60	332	5.7	1.00	1.00
	61 to 120	2567	7.2	1.26 (0.79 to 2.02)	1.50 (0.93 to 2.43)
	121 to 180	3146	8.2	1.45 (0.91 to 2.31)	1.47 (0.92 to 2.35)
	181 to 240	2142	8.5	1.51 (0.94 to 2.42)	1.45 (0.90 to 2.35)
	241 to 480	3302	9.2	1.63 (1.03 to 2.60)	1.68 (1.05 to 2.69)

FMC indicates first medical contact; PCI, percutaneous coronary intervention.

^*Hazard ratios expressed as mortality/30 minutes of time delay.

^*Hazard ratios expressed as mortality/60 minutes of time delay.