Relation between coronary artery disease, baseline clinical variables, revascularization mode, and mortality. CABRI...

Area of Science:

• Cardiology
• Interventional Cardiology
• Health Services Research

Background:

• The Coronary Angioplasty vs. Bypass Revascularisation Investigation (CABRI) trial initially found no significant mortality difference between percutaneous transluminal coronary angioplasty (PTCA) and coronary artery bypass grafting.
• Nonrandomized studies suggest coronary artery disease (CAD) severity and distribution influence outcomes.

Purpose of the Study:

• To investigate the effect of prerevascularization CAD on 1-year mortality within the CABRI trial population.
• To adjust for baseline variables and assess the impact of CAD severity on mortality differences between PTCA and coronary artery bypass grafting.

Main Methods:

• Utilized data from 974 patients with sufficient angiographic results from the CABRI trial.
• Employed various weighted and non-weighted CAD scores, including the Duke score, and cross-tabulated them against 1-year mortality.
• Developed a logistic regression model incorporating demographic, clinical variables, and CAD scores to predict mortality.

Main Results:

• Peripheral vascular disease, previous cerebrovascular accident, older age, higher Duke CAD score, and undergoing PTCA were significant predictors of mortality.
• After adjusting for baseline variables including CAD severity, PTCA was associated with significantly higher 1-year mortality compared to coronary artery bypass grafting.

Conclusions:

• Prerevascularization coronary artery disease severity is a significant factor influencing outcomes in patients undergoing revascularization.
• The findings suggest that PTCA may be associated with higher mortality than coronary artery bypass grafting when accounting for CAD characteristics in the CABRI population.