Effect of Gender on Postoperative Outcome and Duration of Ventilation After Coronary Artery Bypass Grafting (CABG).

Introduction: The study assessed coronary artery bypass grafting (CABG) postoperative outcomes and associated factors in Saudi male and female patients. This was a retrospective cohort of patients who underwent CABG at the King Abdulaziz University Hospital (KAUH), Jeddah, Saudi Arabia, from January 2015 to December 2022.  Results: We included 392 patients, of whom 63 (16.1%) were female. Female undergoing CABG were significantly older (p=0.0001), had a significantly higher incidence of diabetes (p=0.0001), obesity (p=0.001), hypertension (p=0.001), and congestive heart failure (p=0.005), with a smaller body surface area (BSA) (p=0.0001) than male. Though renal dysfunction, previous cerebrovascular accident/transient ischemic attack (CVA/TIA), and myocardial infarction (MI), incidences were similar in both genders. Females were at significantly higher risk of mortality (p=0.0001), longer hospital stay (p=0.0001), and prolonged ventilation (p=0.0001). Preoperative renal dysfunction was the only statistically significant predictor of postoperative complications (p=0.0001). Female gender and preoperative renal dysfunction, were significant independent predictors of postoperative mortality and prolonged ventilation (p=0.005).

Conclusion: This study's findings indicated that females have worse CABG outcomes and a higher risk of morbidities and complications. Uniquely our study showed a higher incidence of prolonged ventilation in females postoperatively.