Gender differences in mortality rates for coronary artery bypass surgery

Area of Science:

• Cardiovascular Surgery
• Health Services Research
• Biostatistics

Background:

• Coronary artery bypass surgery (CABS) is a common procedure for cardiovascular disease.
• Understanding factors influencing in-hospital mortality is crucial for improving patient outcomes.
• Previous research suggests potential gender differences in surgical risk and outcomes.

Purpose of the Study:

• To investigate gender-based differences in in-hospital mortality rates among patients undergoing coronary artery bypass surgery.
• To determine if gender remains a significant predictor of mortality after adjusting for preoperative clinical risk factors.

Main Methods:

• Utilized a state-wide database of clinical risk factors for cardiac surgery in New York State, 1989.
• Employed logistic regression analysis to control for preoperative risk factors.
• Calculated crude and risk-adjusted mortality rates and odds ratios for men and women.

Main Results:

• Crude in-hospital mortality rates were 3.08% for men and 5.43% for women.
• Risk-adjusted mortality rates were 3.33% for men and 4.45% for women.
• Gender was a significant predictor of mortality, with an adjusted odds ratio of 1.52 for women compared to men (95% CI 1.25-1.90).

Conclusions:

• Women undergoing coronary artery bypass surgery experienced significantly higher in-hospital mortality than men, even after adjusting for preoperative risk factors.
• The findings indicate a persistent gender disparity in cardiac surgery outcomes.
• Further research is warranted to explore the underlying causes of this observed mortality difference.