Table 2:

Clinical presentation and procedure characteristics of the two study groups

Variable	No IVUS	IVUS	P value
Number	1,771,390	105,787
Stable coronary artery disease	29.4%	35.0%	<0.001
Unstable angina	15.0%	16.9%	<0.001
Non-ST elevation myocardial infarction (MI)	34.5%	33.1%	<0.001
Anterior ST-elevation MI	8.1%	7.0%	<0.001
Inferior ST-elevation MI	13.6%	8.7%	<0.001
Cardiogenic shock	4.6%	4.5%	0.03
Cardiac arrest	3.9%	3.6%	<0.001
Length of hospital stay (days), median (IQR)	3 (2–5)	3 (1–5)	<0.001
Bare-metal stents	23.1%	17.5%	<0.001
Drug-eluting stents	78.3%	84.1%	<0.001
Bifurcation lesion	2.2%	4.0%	<0.001
Chronic total occlusion	10.6%	10.1%	<0.001
Number of stents*
Mean ± SD	1.5±0.8	1.6±0.9	<0.001
1	67.2%	60.2%
2	22.6%	25.1%
3	7.1%	9.7%
≥4	3.1%	5.0%
Number of vessels**
Mean ± SD	1.3±0.5	1.3±0.6	<0.001
1	79.3%	72.8%
2	17.3%	21.4%
3	2.8%	4.8%
≥4	0.6%	1.1%
Complex percutaneous coronary intervention†	31.2%	39.3%

^*6.1% of the values missing

^**14.9% of the values missing.

^†Defined as ≥3 stents placed and/or ≥ 2 vessels treated and/or intervention on a bifurcation/CTO lesion