Comparison between Three Different Equations for the Estimation of Glomerular Filtration Rate in Omani Patients with Type 2 Diabetes Mellitus
Journal Title: Sultan Qaboos University Medical Journal - Year 2014, Vol 14, Issue 2
Abstract
Objectives: Estimated glomerular fltration rate (eGFR) is an important component of a patient’s renal function profle. Te Modifcation of Diet in Renal Disease (MDRD) equation and the Chronic Kidney DiseaseEpidemiology Collaboration (CKD-EPI) equation are both commonly used. Te aim of this study was to compare the performance of the original MDRD186, revised MDRD175 and CKD-EPI equations in calculating eGFR in type 2 diabetes mellitus (T2DM) patients in Oman. Methods: Te study included 607 T2DM patients (275 males and 332 females, mean age ± standard deviation 56 ± 12 years) who visited primary health centres in Muscat, Oman, during 2011 and whose renal function was assessed based on serum creatinine measurements. Te eGFR was calculated using the three equations and the patients were classifed based on chronic kidney disease (CKD) stages according to the National Kidney Foundation Kidney Disease Outcomes Quality Initiative guidelines. A performance comparison was undertaken using the weighted kappa test. Results: Te median eGFR (mL/min/1.73 m2) was 92.9 for MDRD186, 87.4 for MDRD175 and 93.7 for CKD-EPI. Te prevalence of CKD stage 1 was 55.4%, 44.7% and 57% while for stages 2 and 3 it was 43.2%, 54% and 41.8%, based on MDRD186, MDRD175 and CKD-EPI, respectively. Te agreement between MDRD186 and CKD-EPI (к 0.868) was stronger than MDRD186 and MDRD175 (к 0.753) and MDRD175 and CKD-EPI (к 0.730). Conclusion: Te performances of MDRD186 and CKD-EPI were comparable. Considering that CKD-EPI-based eGFR is known to be close to isotopically measured GFR, the use of MDRD 186 rather than MDRD175 may be recommended.
Authors and Affiliations
Salima R. S. Al-Maqbali| Department of Laboratory Medicine, Sohar Hospital, Sohar, Oman, Waad-Allah S. Mula-Abed| Department of Laboratory Medicine, Sohar Hospital, Sohar, Oman
Keywords
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