Table 1.

Characteristics of the study patients.

	Overall (n = 20,462)	Men (n = 15,281)	Women (n = 5181)	P	Age < 80 years (n = 15,625)	Age ≥ 80 years (n = 4837)	P
Age, y	68.8 ± 13.3	66.3 ± 12.9	76.0 ± 11.6	<0.0001	63.7 ± 10.8	85.2 ± 4.3	<0.001
Men, %	74.7	100.0	0.0	–	81.5	52.6	<0.001
STEMI, %	79.7	80.3	77.7	0.0004	80.7	76.3	<0.001
Killip classification, %				<0.0001			<0.001
1	71.8	74.2	64.7		76.2	57.5
2	11.8	10.8	14.8		10.1	17.3
3	6.3	5.4	8.9		4.7	11.6
4	10.1	9.6	11.6		9.0	13.6
Coronary risk factors, %
Hypertension	63.6	61.7	68.9	<0.0001	61.4	70.4	<0.001
Diabetes mellitus	32.8	33.0	32.2	0.299	34.0	28.9	<0.001
Dyslipidemia	46.2	46.7	44.5	0.010	49.9	34.8	<0.001
Active smoking	34.5	42.1	11.9	<0.0001	40.7	14.3	<0.001
Transportation, %				0.046
Ambulance	78.9	78.6	79.7		78.3	80.8	0.043
Self	18.3	18.7	17.2		19.1	15.8
In-hospital onset	2.8	2.7	3.1		2.6	3.4
Emergency CAG, %	89.6	91.6	83.9	<0.0001	92.9	79.0	<0.001
Anterior MI, %	47.6	47.8	47.2	0.495	48.1	45.8	0.010
LMT culprit lesion, %	3.0	3.2	2.4	0.020	2.9	3.4	0.186
Primary PCI, %	87.9	89.6	82.7	<0.0001	90.3	79.9	<0.001
Door-to-balloon time, min	80 (52–142)	80 (51–139)	85 (55–150)	0.001	79 (51–138)	87 (55–159)	<0.001
Onset-to-balloon time, min	230 (141–420)	225 (138–408)	237 (150–460)	<0.001	220 (138–398)	250 (162–488)	<0.001
Final TIMI flow, %				0.279			0.002
0	2.1	2.1	1.9		2.0	2.5
1	1.1	1.1	1.4		1.1	1.4
2	5.2	5.1	5.6		4.9	6.4
3	91.6	91.7	91.1		92.0	89.8
In-hospital mortality, %	8.3	6.9	12.4	<0.0001	5.5	17.4	<0.001
Cardiac death	6.6	5.2	10.4	<0.0001	4.2	14.1	<0.001

CAG, coronary angiography; LMT, left main trunk; MI, myocardial infarction; PCI, percutaneous coronary intervention; STEMI, ST-elevation myocardial infarction.