Table 1.

Clinical characteristics of included patients according to the use of thrombus aspiration during P-PCI

	Before Matching			After Matching
	Thrombus aspiration and P-PCI (n = 3311)	P-PCI only (n = 6247)	p-value	Thrombus aspiration and P-PCI (n = 1750)	P-PCI only (n = 1750)	p-value
Age	60 ± 13	63 ± 13	< 0.001	61 ± 13	60 ± 13	0.10
Male	77.4%	74.6%	0.002	77.7%	78.6%	0.59
Risk factors
Dyslipidemia	44.7%	44.6%	0.95	45.0%	46.2%	0.50
DM	18.7%	24.0%	< 0.001	19.0%	18.9%	0.93
Smoking	43.1%	36.4%	< 0.001	41.8%	45.0%	0.38
Hypertension	53.3%	59.7%	< 0.001	54.1%	54.5%	0.87
Previous history
MI	11.3%	14.2%	< 0.001	12.1%	12.3%	0.84
PCI	12.3%	14.0%	0.035	12.9%	13.8%	0.46
CABG	1.3%	1.7%	0.188	1.3%	1.1%	0.64
Stroke	3.9%	5.2%	0.009	4.0%	4.1%	1.00
PAD	1.9%	3.1%	0.002	1.9%	1.9%	1.00
HF	0.9%	1.9%	< 0.001	0.8%	0.6%	0.69
CKD	3.2%	3.4%	0.56	3.7%	4.6%	0.21
Admission
KK IV class	6.3%	6.6%	0.57	7.3%	6.4%	0.43
Infarction-related artery
LM	1.0%	1.3%	0.20	3.6%	3.5%	0.86
LAD	42.4%	35.7%	< 0.001	69.1%	69.4%	0.86
Circumflex	13.4%	17.5%	< 0.001	39.5%	46.8%	< 0.001
RCA	42.8%	45.1%	0.03	58.8%	57.3%	0.36
Radial access	40.2%	22.9%	< 0.001	40.3%	20.3%	< 0.001
Stenting / DES	79.4% / 47.5%	75.9% / 50.9%	< 0.001	91.6% / 45.4%	90.9% / 46.9%	0.50 / 0.40
GpIIb/IIIa	36.9%	18.9%	< 0.001	51.9%	31.0%	< 0.001

CABGCoronary artery bypass graft, CKD Chronic kidney disease, DES Drug-eluting stent, DM Diabetes Mellitus, HF heart failure, KK Killip-Kimball, LAD Left Anterior Descending Artery, LM Left Main Artery, MI Myocardial infarction, PAD peripheral artery disease, PCI angioplasty/percutaneous coronary intervention, P-PCI Primary angioplasty. RCA Right Coronary Artery, TA Thrombus aspiration