Secular trends in prevalence of diabetes among younger patients admitted with acute myocardial infarction

Diabetes prevalence is increasing in the population, both in the young and the elderly. We assessed the impact of increasing prevalence of diabetes on admissions for acute myocardial infarctions (MI) from 1990 through 1997. We retrospectively identified all patients discharged with the primary diagnosis of MI from any Veteran's Affairs Medical Center (VAMC) in the country between October 1990 and September 1997. Patients were classified as having diabetes from the ICD-9-CM codes and stratified by age. Demographic data were extracted from the patient treatment files. Prevalence of diabetes among MI patients for the years 1990 through 1997 was compared to that in the general population obtained from the Center for Disease Control. We identified 67,889 patients with MI of whom 17,756 (26%) had diabetes. In the age group ≤44 years, the prevalence of diabetes remained at approximately 11.5% from 1991 to 1998. In the age group 45–64 years, the increase was from 23% to 28%—a 23% increase ( p