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. 2021 Nov 19;13:11795735211042166. doi: 10.1177/11795735211042166

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — Correlation with renal function in “non-inflammatory” cerebrospinal fluid (CSF) profile patients. Depicted are the correlations of serum albumin (A1), cerebrospinal fluid (CSF) albumin (A2), serum kappa free light chain (KFLC) (B1), and CSF KFLC (B2) concentrations with renal function estimated by the glomerular filtration rate (eGFR) according to the CKD-EPI equation in “non-inflammatory” CSF profile patients. Further, the correlation between CSF/serum quotients of albumin (A3) and KFLC (B3) and eGFR is shown. In C1, the correlation between eGFR and KFLC index (Q_KFLC/Q_Alb) is depicted, while C2 presents the correlation between eGFR and the intrathecal KFLC fraction in relation to Q_mean according to Reiber’s diagram for KFLC (KFLC IF). In the caption, P-values of linear regression and Spearman’s r (Gaussian distributed values) or Pearson’s r (nonparametric distributed values) as well as the coefficient of correlation (ρ) are shown.