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. 2021 May 11;60(7):4069–4082. doi: 10.1007/s00394-021-02547-7

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Pearson’s Correlation Coefficients (ρ (95% CI)) and Lin’s concordance correlation coefficients (ρ_c (95% CI)) for intake of protein and potassium according to urinary biomarkers nitrogen and potassium (B), myfood24-Germany (myfood24) and weighed dietary record (WDR). Measurements were based on one 24-h dietary recall, 1 day of WDR and one 24-h urine completed for the same day by n = 89 participants. Intake variables were log transformed to improve normal distribution