Intraoperative blood transfusion is a major risk factor for coronary artery bypass grafting in women

Area of Science:

• Cardiovascular Surgery
• Health Outcomes Research
• Gender Disparities in Medicine

Background:

• Women exhibit higher mortality rates following coronary artery bypass grafting (CABG) compared to men.
• The underlying reasons for these sex-based outcome disparities after CABG remain unclear.
• Investigating patient-specific factors is crucial for understanding differential surgical outcomes.

Purpose of the Study:

• To identify factors contributing to poorer outcomes in women undergoing CABG compared to men.
• To analyze the influence of sex and other patient characteristics on surgical results.

Main Methods:

• Analysis of a database comprising 2,569 patients who underwent coronary artery bypass grafting.
• Utilized stepwise logistic regression to determine predictors of adverse outcomes.

Main Results:

• Women experienced significantly higher mortality, postoperative bleeding, and pulmonary failure (p < 0.05).
• No significant differences were observed in renal failure, infection, stroke, or intra-aortic balloon pump use between sexes.
• Patient factors, rather than sex alone, were identified as significant predictors for various adverse outcomes, including mortality and bleeding.

Conclusions:

• Despite poorer preoperative health indicators in men (higher creatinine, reoperation rates, lower ejection fraction, more aortic atherosclerosis), they had lower mortality and morbidity.
• Poorer outcomes in women are linked to increased transfusion needs during surgery.
• Diabetes is a predictor for renal failure and stroke post-CABG.