Diabetes is a well-established CHD risk factor known to double a person's chance of dying from heart disease. There has been much debate, but no large studies of whether diabetes carries different heart risks for women than for men, said Mark Woodward, Ph.D., professor of biostatistics at The George Institute for International Health at the University of Sydney, Australia.
Using data on more than 450,000 people, which included participants in the Asia Pacific Cohort Studies Collaboration, researchers found that men with diabetes had about 90 percent higher risk of dying from CHD as men without diabetes. Women with diabetes had more than two and a half times the risk of women without diabetes. That translates to a greater than 50 percent excess relative risk for women than for men, he said.
The data came from two previous meta-analyses of 16 studies and a collaborative overview of 44 studies in nine countries in the Asia-Pacific Region (China, Japan, South Korea, Taiwan, Hong Kong, Singapore, Thailand, New Zealand and Australia).
About 5 percent of all the participants had diabetes. Diabetes was defined according to self-reported history with or without fasting glucose evidence as an alternative. The researchers were able to adjust for age, systolic blood pressure, total cholesterol and cigarette smoking in most of the data sets, he said.
Perhaps better monitoring and control of blood glucose levels in women with diabetes would reduce their CHD risk compared with men with diabetes, Woodward said.
"There is some evidence to suggest that people with diabetes benefit from treatment with aspirin, cholesterol-lowering drugs and blood pressure-lowering agents," he said.