(HealthDay News) — From 1998–2010 there was a decrease in the incidence rates of hospitalized myocardial infarction (MI) and coronary heart disease (CHD) among adults with diabetes mellitus in Western Australia, according to a study published online August 26 in Circulation: Cardiovascular Quality and Outcomes.

Lee Nedkoff, MPH, from the University of Western Australia, and colleagues compared population trends in the incidence of hospitalized MI and CHD in adults with and without diabetes from 1998–2010. They calculated age-standardized MI and CHD incidence rates for those aged 35–84 years with and without diabetes.

The researchers found that for men and women with diabetes, there were reductions in MI incidence rates (−2.9 and −3.8%t/year, respectively), representing overall decreases of 35 and 43% respectively. Similar reductions were observed in incident CHD. For those with diabetes, downward trends in MI incidence were most apparent among those aged 55–84 years. No decline in MI incidence was seen in adults without diabetes, but there were small but significant decreases in incident CHD (−1.5%/year for men and −1.3%/year for women). Between 1998–2010, there were decreases in the incidence rate ratios for MI in men with vs. without diabetes (4.5 to 3.1) and in women with vs without diabetes (6 to 3.8).

“There have been significant reductions in incidence rates of MI and CHD in adults with diabetes between 1998–2010,” the authors write.

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