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. 2020 Sep 24;10:15649. doi: 10.1038/s41598-020-72815-9

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© The Author(s) 2020

Open Access This 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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Relationship between the urea-to-creatinine ratio, different types of acute kidney injury and long-term mortality. An increased urea-to-creatinine ratio and non-recovered AKI were independent risk factors for long-term all-cause mortality. In contrast, an increased urea-to-creatinine ratio was not associated with transient AKI and transient AKI was not associated with increased long-term mortality. Black arrows denote an independent association, grey arrows denote a presumed association that was not confirmed in the current study.