Table 4.

In‐Hospital Complications

	Ellis I/II	Ellis III	P value*
Procedural major adverse cardiac events†	14 (13.5%)	27 (47.4%)	<0.001
Odds ratio (Ellis III vs I/II ) (95% CI)	5.8 (2.7–12.5)
Adjusted odds ratio‡ (Ellis III vs I/II) (95% CI)	8.4 (3.5–20.5)
Cardiac surgery	2 (1.9%)	8 (14.0%)	0.002
Death within 24 hours	1 (1.0%)	12 (21.1%)	<0.001
Stroke	1 (1.0%)	0 (0.0%)	0.46
Reintervention	5 (4.8%)	6 (10.5%)	0.17
Myocardial infarction	7 (6.7%)	13 (22.8%)	0.003
Major vessel occlusion	3 (2.9%)	12 (21.1%)	<0.001
Shock/intra‐aortic balloon pump insertion	8 (7.7%)	28 (49.1%)	<0.001
Tamponade
No	92 (88.5%)	32 (56.1%)	<0.001
Acute	4 (3.8%)	23 (40.4%)
Delayed	8 (7.7%)	2 (3.5%)
Acute renal failure	2 (1.9%)	8 (14.0%)	0.002

^* P value given for chi‐square test of difference between groups.

^† Defined as a composite of death, myocardial infarction, stroke, target vessel revascularization, or cardiac surgery within 24 hours)

^‡ Adjusted for age, sex, indication for percutaneous coronary intervention, type of arterial access, diabetes, chronic kidney disease.