The CKD-EPI and MDRD equations to estimate GFR. Validation in the Swedish Lund-Malmo Study cohort

Research output: Contribution to journalArticle

Abstract

Objective. To compare the recently developed CKD-EPI equation to estimate GFR in adult Swedish-Caucasians with the MDRD equation. Material and methods. Swedish-Caucasians (N = 850, 376 females; median age 60, range 5-95 years) referred for plasma iohexol-clearance (median 55, range 5-223 mL/min/1.73 m(2)) constituted the Lund-Malmo Study cohort. Bias, precision (interquartile range, IQR, of the differences between estimated and measured GFR), accuracy expressed as percentage of estimates +/- 10% (P-10) and +/- 30% (P-30) of measured GFR, and classification ability for five GFR stages < 15, 15-29, 30-59, 60-89 and >= 90 mL/min/1.73 m(2) were compared. Results. Overall there were no important differences between the equations; CKD-EPI/MDRD median values of bias +5.4%/+3.4%, IQR both 14 mL/min/1.73 m(2), P-10 36%/34%, P-30 both 80%, and correctly classified GFR stages 68%/67%. P-30 for the CKD-EPI equation was substantially higher than for MDRD at GFR >= 90 mL/min/1.73 m(2) (93% versus 79%). The MDRD equation performed better in the GFR interval 30-89 mL/min/1.73 m(2), while accuracy was limited for both equations at GFR < 30 mL/min/1.73 m(2) (P-30 < 75% in both females and males). The CKD-EPI/MDRD equations caused a +22%/ +14% bias in the 18-39 year interval and the MDRD equation a + 18% bias >= 80 years. Both equations performed poorly in males with BMI < 20 kg/m(2) (CKD-EPI/MDRD median bias +36%/46%). Conclusion. Overall the recently developed CKD-EPI equation performed well but was not superior to the MDRD equation. The CKD-EPI equation may be preferred in screenings of general populations and in the elderly. None of the equations appeared reliable among patients with markedly decreased GFR, young adults and underweight males.

Details

Authors
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Pharmacology and Toxicology
  • Environmental Health and Occupational Health
  • Medicinal Chemistry
  • Clinical Medicine

Keywords

  • Kidney disease, kidney function tests, glomerular filtration rate, renal insufficiency
Original languageEnglish
Pages (from-to)129-138
JournalScandinavian Journal of Clinical & Laboratory Investigation
Volume71
Issue number2
Publication statusPublished - 2011
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Division of Occupational and Environmental Medicine (013078001), Emergency medicine/Medicine/Surgery (013240200), Division of Clinical Chemistry and Pharmacology (013250300)