• Alka M Kanaya, Deborah Grady, and Elizabeth Barrett-Connor.
• Department of Medicine, Division of General Internal Medicine, University of California, San Diego, USA. alkak@itsa.ucsf.edu
• Arch Intern Med. 2002 Aug 12;162(15):1737-45.

BackgroundMost studies suggest that diabetes is a stronger coronary heart disease (CHD) risk factor for women than men, but few have adjusted their results for classic CHD risk factors: age, hypertension, total cholesterol level, and smoking.ObjectiveTo establish an accurate estimate of the odds ratio for fatal and nonfatal CHD due to diabetes in both men and women.MethodsWe compared the summary odds ratio for CHD mortality and the absolute rates of CHD mortality in men and women with diabetes. We searched the MEDLINE and Cochrane Collaboration databases and bibliographies of relevant articles and consulted experts. Studies that included a nondiabetic control group and provided sex-specific adjusted results for CHD mortality, nonfatal myocardial infarction, and cardiovascular or all-cause mortality were included. Of 4578 articles identified, 232 contained primary data, and 182 were excluded. Two reviewers recorded data on study characteristics, quality, and outcomes from 50 studies.ResultsSixteen studies met all inclusion criteria. In unadjusted and age-adjusted analyses, odds of CHD death were higher in women than men with diabetes. From 8 prospective studies, the multivariate-adjusted summary odds ratio for CHD mortality due to diabetes was 2.3 (95% confidence interval, 1.9-2.8) for men and 2.9 (95% confidence interval, 2.2-3.8) for women. There were no significant sex differences in the adjusted risk associated with diabetes for CHD mortality, nonfatal myocardial infarction, and cardiovascular or all-cause mortality. Absolute CHD death rates were higher for diabetic men than women in every age strata except the very oldest.ConclusionsThe excess relative risk of CHD mortality in women vs men with diabetes was absent after adjusting for classic CHD risk factors, but men had more CHD deaths attributable to diabetes than women.

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