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Diabetics may have diminished survival after coronary artery bypass grafting even with multiple arterial revascularization. We compared multi-arterial versus single-arterial grafting (SAG) survival in diabetic and non-diabetic patients undergoing primary isolated bypass surgery.

This is a retrospective analysis of the Australian and New Zealand Society of Cardiac-Thoracic Surgical Database from June 2001 to January 2020. Patients were classified as having either single or multiple arterial grafting irrespective of the number of venous grafts. The end points were long-term all-cause mortality and 30-day clinical outcomes, which was compared in 1:1 propensity score-matched patients. Cox regression model was used to assess interactions between diabetes and the treatment effect of multi-arterial grafting, reported as hazard …