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Biological variation in the estimated glomerular filtration rate of healthy individuals within 24 h calculated using 2021CKD-EPI equations.
- Source :
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Irish journal of medical science [Ir J Med Sci] 2024 Jun; Vol. 193 (3), pp. 1613-1620. Date of Electronic Publication: 2024 Feb 03. - Publication Year :
- 2024
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Abstract
- Background and Aims: Use the MDRD (Modification of Diet in Renal Disease) and 2021 CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) equation void of race coefficients (CKD-EPI <subscript>Crea</subscript> , CKD-EPI <subscript>Cys-C</subscript> , and CKD-EPI <subscript>Crea+Cys-C</subscript> ) to estimate the BV (Biological variation) of eGFR (estimated glomerular filtration rate) within 24 h in a healthy population to help explain future studies using eGFR in the context of a known BV.<br />Methods: Blood samples were collected from 30 healthy subjects at six time points within 24 h. Serum creatinine (S-Crea) and serum cystatin C (S-Cys-C) were measured, and the BV of eGFR was calculated. Outlier and variance homogeneity analyses were performed, followed by CV-ANOVA on trend-corrected data.<br />Results: The eGFR CV <subscript>I</subscript> for the four equations (MDRD, CKD-EPI <subscript>Crea</subscript> , CKD-EPI <subscript>Cys-C</subscript> , and CKD-EPI <subscript>Crea+Cys-C</subscript> ) were 8.39% (7.50-9.51%), 3.90% (3.49-4.42%), 6.58% (5.88-7.46%), and 5.03% (4.50-5.71%), respectively. The corresponding II and RCV <subscript>pos/neg</subscript> values were 0.69, 0.48, 0.51, and 0.31, and (29.30%, - 22.66%), (12.69%, - 11.2 6%), (20.97%, - 17.33%), and (15.88%, - 13.70%), respectively; RCV <subscript>pos /neg</subscript> of eGFR was highest in the MDRD equation and lowest in the CKD-EPI <subscript>Crea</subscript> equation. Additionally, the RCV <subscript>pos/neg</subscript> values of the individual was highest in the MDRD equation and lowest in the CKD-EPI <subscript>Crea+Cys-C</subscript> equation; they are (56.51%, - 36.11%) and (5.01%, - 4.77%), respectively.<br />Conclusions: We present data on the 24 h BV eGFR of the 2021 CKD-EPI equations. The presence of BV has impact on the interpretation of GFR results, affecting CKD disease grading. The RCV <subscript>pos/neg</subscript> differences were large among the individuals. When using eGFRs based on the MDRD and CKD-EPI equations, it is necessary to combine RCV <subscript>pos/neg</subscript> values before interpreting the results.<br /> (© 2024. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.)
Details
- Language :
- English
- ISSN :
- 1863-4362
- Volume :
- 193
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Irish journal of medical science
- Publication Type :
- Academic Journal
- Accession number :
- 38308766
- Full Text :
- https://doi.org/10.1007/s11845-024-03621-9