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Table 2 Patient mortality by hospital volume groups

From: Volume-based referral for cardiovascular procedures in the United States: a cross-sectional regression analysis

  Hospital CABG Volume
  Overall Low (<450) High (≥450) P
Crude rates 3.6 3.9 3.5 0.002
Unadjusted odds ratio (95% CI) - 1.10 (1.04–1.16) 1.00 [referent] 0.001
Adjusted odds ratio (95% CI) - 1.16 (1.10–1.24) 1.00 [referent] <0.001
  Hospital PCI Volume
  Overall Low (<400) High (≥400) P
Crude rates 1.5 2.0 1.43 <0.001
Unadjusted odds ratio (95% CI) - 1.37 (1.28–1.49) 1.00 [referent] <0.001
Adjusted odds ratio (95% CI) - 1.12 (1.05–1.20) 1.00 [referent] 0.001