Clinical Characteristics and Outcomes of Japanese Women Undergoing Coronary Revascularization Therapy

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Background: Limited data are available for gender-based differences in patients undergoing coronary revascularization. This study aimed to identify gender-based differences in risk factor profiles and outcomes among Japanese patients undergoing coronary revascularization. Methods and Results: The subjects consisted of 2,845 women and 6,843 men who underwent first percutaneous coronary intervention or coronary artery bypass grafting in 2000-2002. The outcome measures were all-cause death, major adverse cardiovascular events (MACE) as the composite of cardiovascular death, myocardial infarction and stroke, and any coronary revascularization. The females were older than the males and more frequently had histories of heart failure, diabetes, hypertension, chronic kidney disease, anemia, and dyslipidemia. Unadjusted survival analysis revealed a significantly lower incidence of any revascularization in women (at 3 years: 28.2% vs. 31.2%, P=0.0037), although no significant gender-based differences were shown in the incidence of all-cause death (at 3 years: 8.8% vs. 8.5%, P=0.37) or MACE (at 3 years: 12.0% vs. 11.5%, P=0.61). Multivariate analysis revealed that female gender was associated with significantly lower risks of any revascularization (relative risk=0.93, 95% confidence interval [CI]=0.88-0.99, P=0.014) and all-cause death (relative risk=0.86, 95%CI=0.77-0.96, P=0.005). Conclusions: In Japanese patients undergoing first coronary revascularization, the coronary risk factor burden appeared greater in women than in men. Despite the greater modifiable risk factor accumulation, female gender was associated with a lower incidence of repeated revascularization relative to male gender. (Circ J 2011; 75: 1358-1367)

Clinical Characteristics and Outcomes of Japanese Women Undergoing Coronary Revascularization Therapy

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