CLINICAL STUDY: OBESITY, DIABETES, AND HEART DISEASE
Coronary atherosclerosis in diabetes mellitus
A population-based autopsy study
Tauqir Y. Goraya, MD, PhD*,
Cynthia L. Leibson, PhD||,
Pasquale J. Palumbo, MD ,
Susan A. Weston, MS ,
Jill M. Killian, BS ,
Eric A. Pfeifer, MD ,
Steven J. Jacobsen, MD, PhD||,
Robert L. Frye, MD* and
V.éronique L. Roger, MD, MPH*,*
* Division of Cardiovascular Diseases and Internal Medicine, Mayo Clinic Scottsdale and Rochester and Mayo Foundation, Rochester, Minnesota, USA
Division of Anatomic Pathology, Mayo Clinic Scottsdale and Rochester and Mayo Foundation, Rochester, Minnesota, USA
Division of Endocrinology and Internal Medicine, Mayo Clinic Scottsdale and Rochester and Mayo Foundation, Rochester, Minnesota, USA
Division of Biostatistics, Mayo Clinic Scottsdale and Rochester and Mayo Foundation, Rochester, Minnesota, USA
|| Division of Epidemiology, Mayo Clinic Scottsdale and Rochester and Mayo Foundation, Rochester, Minnesota, USA
Manuscript received April 3, 2001;
revised manuscript received May 7, 2002,
accepted May 24, 2002.
* Reprint requests and correspondence: Dr. Véronique L. Roger, Mayo Clinic, 200 First Street SW, Rochester, Minnesota 55905, USA.
OBJECTIVES: The study was conducted to test the hypothesis that the prevalence of coronary atherosclerosis is greater among diabetic than among nondiabetic individuals and is similar for diabetic individuals without clinical coronary artery disease (CAD) and nondiabetics with clinical CAD.
BACKGROUND: Persons with diabetes but without clinical CAD encounter cardiovascular mortality similar to nondiabetic individuals with clinical CAD. This excess mortality is not fully explained. We examined the association between diabetes and coronary atherosclerosis in a geographically defined autopsied population, while capitalizing on the autopsy rate and medical record linkage system available via the Rochester Epidemiology Project, which allows rigorous ascertainment of coronary atherosclerosis, clinical CAD, and diabetes.
METHODS: Using two measures, namely a global coronary score and high-grade stenoses, the prevalence of atherosclerosis was analyzed in a cohort of autopsied residents of Rochester, Minnesota, age 30 years or older at death, while stratifying on diabetes, clinical CAD diagnosis, age, and gender.
RESULTS: In this cohort, diabetes was associated with a higher prevalence of atherosclerosis. Among diabetic decedents without clinical CAD, almost three-fourths had high-grade coronary atherosclerosis and more than half had multivessel disease. Without diabetes, women had less atherosclerosis than men, but this female advantage was lost with diabetes. Among those without clinical CAD, diabetes was associated with a global coronary disease burden and a prevalence of high-grade atherosclerosis similar to that observed among nondiabetic subjects with clinical CAD.
CONCLUSIONS: These findings provide mechanistic insights into the excess risk of clinical CAD among diabetic individuals, thereby supporting the need for aggressive prevention of atherosclerosis in all diabetic individuals, irrespective of clinical CAD symptoms.
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Abbreviations and Acronyms
| | CAD | | coronary artery disease | | CI | | confidence interval | | MI | | myocardial infarction | | NDDG | | National Diabetes Data Group | | OR | | odds ratio | | PR | | prevalence ratio |
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