Table 3.

Hospital Annual PCI Volume and Odds of In-Hospital Mortality

Hospital Annual PCI Volume Groups (Cases/Year Volume Cut Points)	Unadjusted	Adjusted*
Low (<200)	1.58 (1.39–1.80)	1.21 (1.06–1.38)
Medium (200–399)	1.12 (1.00–1.25)	1.02 (0.92–1.14)
High (400–999)	1.00 (referent)	1.00 (referent)
Very high (≥1,000)	0.84 (0.76–0.93)	0.94 (0.85–1.03)
P comparing medium and very high volume hospitals	<0.0001	0.16
P comparing medium, high, very high volume hospitals	<0.0001	0.29
Low (<200)	1.68 (1.47–1.90)	1.24 (1.09–1.41)
Medium (200–399)	1.18 (1.06–1.32)	1.05 (0.95–1.16)
High and very high (≥400)	1.00 (referent)	1.00 (referent)

Data are presented as odds ratios with 95% confidence intervals.

^*Analyses adjusted for age, gender, race, payer, myocardial infarction, coronary artery disease, diabetes, hypertension, chronic obstructive pulmonary disease, admission acuity, interhospital transfer, stent use, single versus multiple vessel procedure, and renal disease.

PCI = percutaneous coronary intervention.