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. 2019 Oct 29;20:397. doi: 10.1186/s12882-019-1584-7

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© The Author(s). 2019

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Plots of the (a) difference between the CKD-EPI equation and measured aGFR on the y-axis (b) difference between the new equation and measured aGFR on the y-axis, both analyzed against the measured aGFR on the x-axis. The CKD-EPI systematically underestimates the aGFR especially at higher values. The new equation distributes error over a wider range of means but also underestimates the aGFR slightly. The mean aGFR was 130.45 ± 40.47 ml/min/1.73m². The mean GFR using the new estimating equations was 126.25 ml/min/1.73m² whereas the mean aGFR using the CKDEPI equation was 104.73 ± 17.75 ml/min/m²