Utility of Cystatin C-based Equation for the Estimation of Glomerular Filtration Rate in a Pediatric Population
Journal of Applied Laboratory Medicine, ISSN: 2475-7241, Vol: 9, Issue: 4, Page: 803-808
2024
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Utility of cystatin C-based equation for eGFR pediatric population
Listen to the JALMTalk Podcast Article Ridwan B Ibrahim, Poyyapakkam Srivaths, Estella Tam, Sridevi Devaraj. Utility of Cystatin C-based Equation for the Estimation of Glomerular
Article Description
Background: The accurate assessment of kidney function is vital for the early detection of kidney damage. The estimated glomerular filtration rate GFR (eGFR) from serum cystatin C (CysC) and creatinine-based equations are commonly used in clinical practice as an alternative to the invasive measured glomerular filtration rate (mGFR), which is the usually accepted overall best index of kidney function in health and disease. Recently the CKiD under 25 (CkiD U25) equations have been shown to perform well in children and young adults with chronic kidney disease (CKD). In this focused report, we evaluated the performance of the CkiD U25 equations alongside 3 non-race-corrected (NRC) eGFR equations commonly used in pediatrics in our cohort. Methods: mGFR measured following the intravenous injection of tracer Tc-99mDTPA was retrospectively compared with eGFR from these equations in 57 patients (6 months to 22 years) from different races/ethnicities. Ordinary least squares regression analyses were used to assess correlation between the mGFRs and eGFRs. Results: The average mGFR for this cohort was 84.1mL/min/1.73m2. The NRC creatinine equations overestimated eGFR across all groups, with the lowest bias for CKiD U25-creatinine (22.59mL/min/1.73m2). The best correlations to mGFR, P30, and lowest biases were the CKiD U25-CysC (0.6281, 80.7%, 3.72mL/min/1.73m2) and Schwartz CysC (0.6372, 77.2%, -4.68mL/min/1.73m2). Conclusions: Overall, both CKiD U25-CysC and Schwartz CysC provide a good estimation of mGFR with the CKiD U25-CysC having the overall best performance compared to mGFR in our study.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85197595590&origin=inward; http://dx.doi.org/10.1093/jalm/jfae034; http://www.ncbi.nlm.nih.gov/pubmed/38656545; https://academic.oup.com/jalm/article/9/4/803/7657615; https://dx.doi.org/10.1093/jalm/jfae034; https://academic.oup.com/jalm/article-abstract/9/4/803/7657615?redirectedFrom=fulltext
Oxford University Press (OUP)
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