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- W4383876444 abstract "Abstract Background: When applying Pierce U25 formula for estimating glomerular filtration rate (eGFR), we observed a higher proportion of eGFR<90 mL/min/1.73 m 2 (chronic kidney disease=CKD stage 2). We compared agreement and accuracy of the Pierce U25 (ages 2-25), Pottel (ages 2-100), and CKD-EPI (ages 18-100) formulae to GFR measurements. Methods: Post-hoc analysis of the three eGFRs compared to 367 99 m technetium-diethylene-triamine penta-acetic acid ( 99 Tc DTPA) GFR measurements (240 patients) using 3 sampling points and Brockner/Mørtensen correction (body surface area calculation based on ideal weight) on simultaneous serum creatinine and cystatin C measurements. Results: Overall, the U25 formula performed well with a Spearman r of 0.8102 (95% confidence interval 0.7706 to 0.8435, p<0.0001) while diagnostic accuracy was low in patients with normal mGFR. The U25 formula reclassified 29.5% of patients with normal mGFR as CKD stage 2; whereas the average of the modified Schwartz formula based on serum creatinine and the Filler formula based on cystatin C, only over diagnosed CKD stage 2 in 8.5%, 24.5% within 10% and 62.7% within 30%. We therefore combined both. The average Schwartz/Filler eGFR had 36.5% of results within 10%, 84.7% within 30%, and normal mGFR accuracy was 26.8%, 63.9% for 10% and 30%, respectively, outperforming the CKD-EPI and Pottel formulae. Interpretation: The Pierce U25 formula results correlated well with mGFR<75 mL/min/1.73m 2 . Over the entire GFR range, accuracy was better for patients with a higher mGFR, when averaging the combined Schwartz/Filler formulae. More work is needed to prospectively confirm our findings in other centers." @default.
- W4383876444 created "2023-07-12" @default.
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- W4383876444 date "2023-07-10" @default.
- W4383876444 modified "2023-09-23" @default.
- W4383876444 title "Limitations of U25 CKiD and CKD-EPI eGFR formulae in patients 2-20 years of age with measured GFR>60 mL/min/1.73 m2 – A cross-sectional study" @default.
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- W4383876444 doi "https://doi.org/10.21203/rs.3.rs-3132710/v1" @default.
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