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Related Experiment Videos

Application of GFR-estimating equations in Chinese patients with chronic kidney disease.

Li Zuo1, Ying-Chun Ma, Yu-Hong Zhou

  • 1Institute of Nephrology and Division of Nephrology, First Hospital, Peking University, Beijing, PR China. zuoli@medmail.com.cn

American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation
|March 9, 2005
PubMed
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The Modification of Diet in Renal Disease (MDRD) equations overestimate glomerular filtration rate (GFR) in advanced chronic kidney disease (CKD) stages 4-5 and underestimate it in stage 1 for Chinese patients. Modifications may be needed for accurate GFR estimation in this population.

Area of Science:

  • Nephrology
  • Clinical Chemistry

Background:

  • Chronic kidney disease (CKD) affects a significant portion of the global population.
  • Accurate estimation of glomerular filtration rate (GFR) is crucial for CKD diagnosis and management.
  • Existing GFR estimation equations may require population-specific validation.

Purpose of the Study:

  • To assess the accuracy of the Modification of Diet in Renal Disease (MDRD) equations for estimating GFR in Chinese patients with CKD.
  • To compare the MDRD equations (MDRD equation 7 and abbreviated MDRD) and the Cockcroft-Gault equation against a reference standard GFR in different CKD stages.

Main Methods:

  • The study included 261 Chinese patients diagnosed with CKD.
  • Glomerular filtration rates (GFRs) were estimated using the MDRD equation 7 (7GFR), abbreviated MDRD equation (aGFR), and Cockcroft-Gault equation (cGFR).

Related Experiment Videos

  • GFR was measured using technetium Tc 99m-labeled diethylene triamine pentaacetic acid plasma clearance as the reference standard (sGFR).

    • Main Results:

    • Both MDRD equations (7GFR, aGFR) and the cGFR significantly overestimated sGFR in Chinese CKD patients with stages 4 to 5.
    • Conversely, 7GFR, aGFR, and cGFR significantly underestimated sGFR in patients with CKD stage 1.
    • The discrepancies between estimated and standard GFR increased with the severity of CKD.

    Conclusions:

    • The MDRD equations demonstrate suboptimal accuracy for GFR estimation in Chinese CKD patients.
    • Overestimation in advanced CKD and underestimation in early CKD suggest a need for equation modification in this demographic.
    • Clinical application of MDRD equations in Chinese CKD populations requires careful consideration and potential adjustments.