Table 2:

Significant factors associated with the likelihood of PCI being performed instead of CABG surgery among patients who underwent revascularizion^*

Factor	Odds ratio (95% CI)	p value
Patient
Age, yr (v. 65–74)
< 50	1.4 (0.9–2.0)	0.11
50–64	1.1 (0.9–1.4)	0.29
≥ 75	1.6 (1.2–2.1)	< 0.001
Female (v. male)	1.4 (1.1–1.7)	0.003
Cardiac history and risk factors
Diabetes (v. no diabetes)	0.8 (0.6–0.9)	0.01
Previous PCI (v. no previous PCI)	1.6 (1.2–2.2)	0.002
Coronary anatomy (v. 3-vessel disease)
1 vessel	37.5 (27.9–50.4)	< 0.001
2 vessels	5.6 (4.5–7.0)	< 0.001
Left main artery	0.3 (0.2–0.4)	< 0.001
Prior CABG	30.1 (18.7–48.6)	< 0.001
Clinical indication (v. elective stable coronary artery disease)
Unstable angina	0.9 (0.7–1.2)	0.68
Non-ST-segment elevation MI	1.3 (1.0–1.7)	0.02
Non-emergent ST-segment elevation MI	1.6 (1.0–2.5)	0.04
Emergent ST-segment elevation MI	7.8 (5.1–11.7)	< 0.001
Physician
Interventional (v. non-interventional) cardiologist	1.4 (1.1–1.7)	0.01
Hospital
PCI:CABG ratio (v. low ratio [< 2.0])
Low–medium (2.0–2.7)	1.4 (0.9–2.1)	0.16
Medium–high (2.8–3.2)	2.1 (1.3–3.1)	< 0.001
High (> 3.2)	3.1 (2.0–4.9)	< 0.001

Note: CABG = coronary artery bypass graft, CI = confidence interval, MI = myocardial infarction, PCI = percutaneous coronary intervention.

^*The C-statistic for the model was 0.90. This analysis excludes patients for whom type of cardiologist was missing.