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Diabetes Care 30:523-528, 2007
DOI: 10.2337/dc06-1682
© 2007 by the American Diabetes Association
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Epidemiology/Health Services/Psychosocial Research
Original Article

Serum Zinc Level and Coronary Heart Disease Events in Patients With Type 2 Diabetes

Minna Soinio, MD1, Jukka Marniemi, PHD2, Markku Laakso, MD3, Kalevi Pyörälä, MD3, Seppo Lehto, MD4 and Tapani Rönnemaa, MD1

1 Department of Medicine, University of Turku, Turku, Finland
2 Department of Health and Functional Capacity, National Public Health Institute, Turku, Finland
3 Department of Medicine, University of Kuopio, Kuopio, Finland
4 Department of Medicine, Kuopio University Hospital, Kuopio, Finland

Address correspondence and reprint requests to Minna Soinio, MD, Department of Medicine, Turku University Central Hospital, P.O. Box 52, FIN 20521, Turku, Finland. E-mail: minna.soinio{at}tyks.fi

OBJECTIVE—Low serum zinc level may predispose nondiabetic subjects to cardiovascular diseases. Our aim was to investigate whether serum zinc level predicts coronary heart disease (CHD) events in subjects with type 2 diabetes

RESEARCH DESIGN AND METHODS—The original study population consisted of 1,059 patients with type 2 diabetes, aged 45–64 years. Mean duration of diabetes was 8 years. Serum zinc values were available from 1,050 subjects. CHD mortality and the incidence of nonfatal myocardial infarction (MI) were assessed in a 7-year follow-up.

RESULTS—During the follow-up, 156 patients died from CHD and 254 patients had a fatal or nonfatal MI. Patients with serum zinc concentration ≤14.1 µmol/l at baseline had a higher risk for death from CHD than patients with serum zinc level >14.1 µmol/l (20.8 and 12.8%, respectively; P = 0.001) The risks for fatal or nonfatal MI were 30.5 and 22.0%, respectively (P = 0.005). In Cox regression analyses, low serum zinc concentration was significantly associated with CHD mortality (relative risk [RR] 1.7, P = 0.002) and all CHD events (RR 1.37, P = 0.030), even after adjustment for confounding variables.

CONCLUSIONS—In this large cohort of type 2 diabetic patients, low serum zinc level was an independent risk factor for CHD events.

Abbreviations: CHD, coronary heart disease • GFR, glomerular filtration rate • MI, myocardial infarction


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Copyright © 2007 by the American Diabetes Association.