Original ArticlesImpact of gender on coronary bypass operative mortality
Section snippets
Material and methods
The population was taken from patient records registered in the STS National Database from 1994 through the most recent data harvest in 1996. There are 344,913 patients registered as having isolated CABG operations in this period.
These patient records were extracted for analysis using standard statistical software (Statistical Analysis System [SAS] version 6.09 for Windows; SAS Institute, Cary, NC). All p values were determined using χ2 tests with the appropriate degrees of freedom. Specific
General demographics
There were 97,153 women (28.17%) and 247,760 men (71.83%) in the population. The OM for the entire population was 3.15% (10,853/334,913). For women the OM was 4.52% (4,388/97,153), whereas men had a 2.61% (6,465/247,760) mortality (p < 0.001).
A comparison of risk factors for men and women (Table 2) shows that there were significant differences in the two populations. In general, women were older, had a higher incidence of diabetes, hypertension, and peripheral vascular disease, and underwent
Comment
Women are generally considered to have a higher risk of OM after CABG operations. The most common explanations for this observation have centered around the fact that women have smaller, more technically challenging coronary vessels, the less frequent use of IMA grafting in women, and a referral bias causing women to present for surgical intervention at a more advanced stage of disease. On the other hand, some reports indicate that there is no real difference in CABG operative mortality between
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