Evaluation of hypomagnesaemia in diabetic patients with nephropathy in a reference clinical laboratory: a comparative cross sectional study Authors Sumaiya Qamar Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan Muhammad Anwar Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan Zujaja Hina Haroon Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan Afshan Bibi Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan Muhammad Usman Munir Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan Sobia Irum Kirmani Department of Chemical Pathology and Endocrinology, Armed Forces Institute of Pathology, National University of Medical Sciences, Rawalpindi, Pakistan DOI: https://doi.org/10.47391/JPMA.6887 Abstract Serum Magnesium plays a significant role in different diabetic complications. This comparative cross sectional study was conducted to evaluate serum magnesium levels in patients with Type 2 Diabetes Mellitus (T2DM) with and without nephropathy. A total of 182 diabetic patients (91 with nephropathy and 91 without nephropathy) were included. Odds ratio were calculated and Mann Whitney U test was used to compare quantitative variables; p<0.05 was considered significant. The results showed that 64/91 (70.3%) patients with nephropathy had hypomagnesaemia as compared to 21/91 (23.07%) patients without nephropathy. The risk of hypomagnesaemia was higher in patients with nephropathy than without nephropathy (Odds ratio 2.7 vs 0.34). Median magnesium levels (1.73 mg/dl) were lower in patients with nephropathy as compared to patients without nephropathy (2.09 mg/dl), p <0.01. It is concluded that magnesium levels were significantly lower in patients with diabetic nephropathy as compared to without nephropathy. References Basit A, Fawwad A, Baqa K. 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