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Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2.
Am J Kidney Dis. 2010 Sep; 56(3):486-95.AJ

Abstract

BACKGROUND

The Modification of Diet in Renal Disease (MDRD) Study equation underestimates measured glomerular filtration rate (GFR) at levels>60 mL/min/1.73 m2, with variable accuracy among subgroups; consequently, estimated GFR (eGFR)>or=60 mL/min/1.73 m2 is not reported by clinical laboratories. Here, performance of a more accurate GFR-estimating equation, the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation, is reported by level of GFR and clinical characteristics.

STUDY DESIGN

Test of diagnostic accuracy.

SETTING & PARTICIPANTS

Pooled data set of 3,896 people from 16 studies with measured GFR (not used for the development of either equation). Subgroups were defined by eGFR, age, sex, race, diabetes, prior solid-organ transplant, and body mass index.

INDEX TESTS

eGFR from the CKD-EPI and MDRD Study equations and standardized serum creatinine.

REFERENCE TEST

Measured GFR using urinary or plasma clearance of exogenous filtration markers.

RESULTS

Mean measured GFR was 68+/-36 (SD) mL/min/1.73 m2. For eGFR<30 mL/min/1.73 m2, both equations have similar bias (median difference compared with measured GFR). For eGFR of 30-59 mL/min/1.73 m2, bias was decreased from 4.9 to 2.1 mL/min/1.73 m2 (57% improvement). For eGFR of 60-89 mL/min/1.73 m2, bias was decreased from 11.9 to 4.2 mL/min/1.73 m2 (61% improvement). For eGFR of 90-119 mL/min/1.73 m2, bias was decreased from 10.0 to 1.9 mL/min/1.73 m2 (75% improvement). Similar or improved performance was noted for most subgroups with eGFR<90 mL/min/1.73 m2, other than body mass index<20 kg/m2, with greater variation noted for some subgroups with eGFR>or=90 mL/min/1.73 m2.

LIMITATIONS

Limited number of elderly people and racial and ethnic minorities with measured GFR.

CONCLUSIONS

The CKD-EPI equation is more accurate than the MDRD Study equation overall and across most subgroups. In contrast to the MDRD Study equation, eGFR>or=60 mL/min/1.73 m2 can be reported using the CKD-EPI equation.

Authors+Show Affiliations

Tufts Medical Center, Boston, MA 02111, USA. lstevens1@tuftsmedicalcenter.orgNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, N.I.H., Extramural

Language

eng

PubMed ID

20557989

Citation

Stevens, Lesley A., et al. "Comparative Performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study Equations for Estimating GFR Levels Above 60 mL/min/1.73 M2." American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation, vol. 56, no. 3, 2010, pp. 486-95.
Stevens LA, Schmid CH, Greene T, et al. Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2. Am J Kidney Dis. 2010;56(3):486-95.
Stevens, L. A., Schmid, C. H., Greene, T., Zhang, Y. L., Beck, G. J., Froissart, M., Hamm, L. L., Lewis, J. B., Mauer, M., Navis, G. J., Steffes, M. W., Eggers, P. W., Coresh, J., & Levey, A. S. (2010). Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2. American Journal of Kidney Diseases : the Official Journal of the National Kidney Foundation, 56(3), 486-95. https://doi.org/10.1053/j.ajkd.2010.03.026
Stevens LA, et al. Comparative Performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study Equations for Estimating GFR Levels Above 60 mL/min/1.73 M2. Am J Kidney Dis. 2010;56(3):486-95. PubMed PMID: 20557989.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2. AU - Stevens,Lesley A, AU - Schmid,Christopher H, AU - Greene,Tom, AU - Zhang,Yaping Lucy, AU - Beck,Gerald J, AU - Froissart,Marc, AU - Hamm,Lee L, AU - Lewis,Julia B, AU - Mauer,Michael, AU - Navis,Gerjan J, AU - Steffes,Michael W, AU - Eggers,Paul W, AU - Coresh,Josef, AU - Levey,Andrew S, Y1 - 2010/06/16/ PY - 2009/12/23/received PY - 2010/03/16/accepted PY - 2010/6/19/entrez PY - 2010/6/19/pubmed PY - 2010/9/24/medline SP - 486 EP - 95 JF - American journal of kidney diseases : the official journal of the National Kidney Foundation JO - Am J Kidney Dis VL - 56 IS - 3 N2 - BACKGROUND: The Modification of Diet in Renal Disease (MDRD) Study equation underestimates measured glomerular filtration rate (GFR) at levels>60 mL/min/1.73 m2, with variable accuracy among subgroups; consequently, estimated GFR (eGFR)>or=60 mL/min/1.73 m2 is not reported by clinical laboratories. Here, performance of a more accurate GFR-estimating equation, the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation, is reported by level of GFR and clinical characteristics. STUDY DESIGN: Test of diagnostic accuracy. SETTING & PARTICIPANTS: Pooled data set of 3,896 people from 16 studies with measured GFR (not used for the development of either equation). Subgroups were defined by eGFR, age, sex, race, diabetes, prior solid-organ transplant, and body mass index. INDEX TESTS: eGFR from the CKD-EPI and MDRD Study equations and standardized serum creatinine. REFERENCE TEST: Measured GFR using urinary or plasma clearance of exogenous filtration markers. RESULTS: Mean measured GFR was 68+/-36 (SD) mL/min/1.73 m2. For eGFR<30 mL/min/1.73 m2, both equations have similar bias (median difference compared with measured GFR). For eGFR of 30-59 mL/min/1.73 m2, bias was decreased from 4.9 to 2.1 mL/min/1.73 m2 (57% improvement). For eGFR of 60-89 mL/min/1.73 m2, bias was decreased from 11.9 to 4.2 mL/min/1.73 m2 (61% improvement). For eGFR of 90-119 mL/min/1.73 m2, bias was decreased from 10.0 to 1.9 mL/min/1.73 m2 (75% improvement). Similar or improved performance was noted for most subgroups with eGFR<90 mL/min/1.73 m2, other than body mass index<20 kg/m2, with greater variation noted for some subgroups with eGFR>or=90 mL/min/1.73 m2. LIMITATIONS: Limited number of elderly people and racial and ethnic minorities with measured GFR. CONCLUSIONS: The CKD-EPI equation is more accurate than the MDRD Study equation overall and across most subgroups. In contrast to the MDRD Study equation, eGFR>or=60 mL/min/1.73 m2 can be reported using the CKD-EPI equation. SN - 1523-6838 UR - https://www.unboundmedicine.com/medline/citation/20557989/Comparative_performance_of_the_CKD_Epidemiology_Collaboration__CKD_EPI__and_the_Modification_of_Diet_in_Renal_Disease__MDRD__Study_equations_for_estimating_GFR_levels_above_60_mL/min/1_73_m2_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0272-6386(10)00798-5 DB - PRIME DP - Unbound Medicine ER -