Influence of cardiovascular risk factors on the outcome of coronary artery bypass surgery
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Purpose. To assess the impact of gender age and other cardiovascular risk factors on the outcomes of patients undergoing coronary artery bypass grafting (CABG). Methods. A total of 5 067 consecutive patients undergoing isolated CABG between 1995 and 2000 were divided into the age groups: 25-49 years 50-59 years 60-69 years and 70-84 years. Data on patient age gender smoking serum cholesterol blood pressure body mass index diabetes family history morbid obesity and renal failure were retrospectively analyzed. Results. The percentage of women aged >60 years undergoing CABG was higher than the percentage of men aged >60 years (45.6% vs 36.6%). Most of the cardiovascular risk factors except for smoking were favorable in women (P < 0.001). The in-hospital mortality was 2.0% in women and 1.7% in men (P = 0.409). CABG was performed on significantly more men than women accounting for 80.7% and 19.3% of the 5 067 patients respectively (P < 0.001). However the incidence increased remarkably in women aged >60 years. Conclusions. The risks of CABG may vary to some degree in accordance with the major cardiovascular risk factors. The risk of operative mortality was independent of gender in this study.