Table 4:

1-year post-discharge MACE and all-cause mortality by operator volume

	MACE		Mortality
	Unadjusted HR (95% CI)	Adjusted HR (95% CI)	Unadjusted HR (95% CI)	Adjusted HR (95% CI)
Overall
High vs. low volume	1.07 (1.04–1.11)*	1.01 (0.99–1.04)	1.11 (1.07–1.15)*	1.04 (1.00–1.08)
Intermediate vs. low volume	1.03 (1.00–1.06)*	0.99 (0.96–1.01)	1.07 (1.03–1.11)*	1.01 (0.97–1.05)
STEMI only
High vs. low volume	1.04 (0.98–1.10)	0.98 (0.93–1.04)	1.07 (1.00–1.15)	1.01 (0.94–1.09)
Intermediate vs. low volume	1.01 (0.95–1.07)	0.97 (0.91–1.03)	1.06 (0.98–1.14)	1.00 (0.93–1.08)
UA/NSTEMI only
High vs. low volume	1.07 (1.04–1.11)*	1.00 (0.97–1.04)	1.13 (1.08–1.19)*	1.04 (1.00–1.09)
Intermediate vs. low volume	1.03 (0.99–1.06)	1.00 (0.97–1.04)	1.08 (1.03–1.13)*	1.04 (0.99–1.09)
Stable angina only
High vs. low volume	1.04 (0.97–1.11)	0.98 (0.92–1.04)	1.01 (0.92–1.11)	0.93 (0.84–1.02)
Intermediate vs. low volume	0.96 (0.89–1.03)	0.93 (0.87–0.99)*	0.94 (0.85–1.04)	0.89 (0.84–1.02)
Chronic total occlusion
High vs. low volume	0.92 (0.82–1.04)	1.06 (0.93–1.21)	0.92 (0.78–1.08)	1.10 (0.93–1.31)
Intermediate vs. low volume	1.00 (0.88–1.14)	1.01 (0.87–1.16)	1.02 (0.86–1.21)	1.03 (0.85–1.23)
Bifurcation lesion
High vs. low volume	1.13 (1.05–1.22)*	1.07 (0.99–1.16)	1.11 (1.01–1.23)*	1.05 (0.95–1.16)
Intermediate vs. low volume	1.03 (0.95–1.12)	1.00 (0.92–1.09)	0.99 (0.89–1.10)	0.95 (0.85–1.06)
Left main lesion
High vs. low volume	1.05 (0.91–1.20)	0.97 (0.84–1.12)	1.13 (0.94–1.35)	1.01 (0.84–1.22)
Intermediate vs. low volume	0.91 (0.79–1.06)	0.97 (0.84–1.12)	1.00 (0.83–1.22)	0.89 (0.73–1.10)

^*p < 0.05. MACE, major adverse cardiovascular events (all-cause death, readmission for myocardial infarction, unplanned revascularization); HR, hazard ratio; all other abbreviations per Table 3. Low-volume operators performed < 50 PCIs/year; intermediate-volume operators performed 50–100 PCIs/year; high-volume operators performed > 100 PCIs/year