Table 1. Baseline characteristics.

	All, n = 8,939	Revascularization		P-value
		CABG (n = 3,510; 39.3%)	PCI (n = 5,429; 60.7%)
Data are presented as median (IQR) or n (%). 1Analysis restricted to patients who underwent revascularization before January 1, 2019. *Suppressed according to CMS data policy. CABG: coronary artery bypass grafting; PCI: percutaneous coronary intervention.
Age, yrs	79.1 (74.1–83.9)	76.7 (72.6–80.9)	81.0 (75.5–85.7)	< 0.001
Sex				< 0.001
Male	5,511 (61.7%)	2,477 (70.67%)	3,034 (55.97%)
Female	3,428 (38.37%)	1,033 (29.47%)	2,395 (44.17%)
Race				0.18
Non-Hispanic White	7,265 (81.37%)	2,867 (81.77%)	4,398 (81.07%)
Black (or African-American)	689 (7.77%)	250 (7.17%)	439 (8.17%)
Other/Unknown	120 (1.37%)	56 (1.67%)	64 (1.27%)
Asian/Native American	240 (2.77%)	99 (2.87%)	141 (2.67%)
Hispanic	625 (7.07%)	238 (6.87%)	387 (7.17%)
Frail	7,104 (79.57%)	2,633 (75.07%)	4,471 (82.47%)	< 0.001
Community dwelling1	5,890 (84.47%)	2,516 (90.77%)	3,374 (80.37%)	< 0.001
Admission Urgency				< 0.001
Other	3,947 (44.27%)	2,163 (61.67%)	1,784 (32.97%)
Urgent/Emergent	4,992 (55.87%)	1,347 (38.47%)	3,645 (67.17%)
Dual Eligibility	2,444 (27.37%)	793 (22.67%)	1,651 (30.47%)	< 0.001
Patient Geography				0.63
Metropolitan	6,617 (74.07%)	2,608 (74.37%)	4,009 (73.87%)
Non-Metropolitan	2,322 (26.07%)	902 (25.77%)	1,420 (26.27%)
Elixhauser in-hospital mortality index	11.0 (0–23)	7.0 (−2–19)	13.0 (1–26)	< 0.001
Cerebrovascular disease	1,626 (18.2%)	703 (20.0%)	923 (17.0%)	< 0.001
Obesity	2,419 (27.1%)	1,107 (31.5%)	1,312 (24.2%)	< 0.001
Diabetes with chronic complications	4,353 (48.7%)	1,726 (49.2%)	2,627 (48.4%)	0.01
Heart failure	4,632 (51.8%)	1,441 (41.1%)	3,191 (58.8%)	< 0.001
Hypertension, complicated	6,190 (69.2%)	2,253 (64.2%)	3,937 (72.5%)	< 0.001
Peripheral vascular disease	3,699 (41.4%)	1,484 (42.3%)	2,215 (40.8%)	0.17
Chronic pulmonary disease	3,335 (37.3%)	1,277 (36.4%)	2,058 (37.9%)	0.15
Renal failure	2,822 (31.6%)	981 (27.9%)	1,841 (33.9%)	< 0.001