The association between serum magnesium and type 2 Diabetes mellitus in adult patients at a tertiary hospital in Malaysia

Introduction: Magnesium (Mg) has an important role in glucose metabolism and acts as a cofactor for many enzymatic reactions. However, Mg deficiency frequently goes unnoticed. The aim of this study was to determine the association between serum Mg and type 2 diabetes mellitus (T2DM). Methods: A cross-sectional study was done among T2DM patients who were followed-up at the Diabetic Clinic at Hospital Melaka. Serum Mg test was added to the routine investigations of all patients with diabetes who participated. Results: Prevalence of hypomagnesaemia was 21.5. There was a significant difference in age, duration of T2DM and diabetic complications that include retinopathy, neuropathy, nephropathy, coronary heart disease and cerebrovascular accident as well as all laboratory parameters except high-density lipoprotein cholesterol between the hypomagnesaemia and normomagnesaemia groups. Glycated haemoglobin (HbA1c), fasting plasma glucose and duration of diabetes independently predicted serum Mg levels in T2DM patients. Conclusion: These find- ings support the use of serum Mg as an indirect biomarker of glycaemic control in T2DM patients, whereby hypomagnesaemia indicates poor control.

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