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. 2019 Mar 14;9:4527. doi: 10.1038/s41598-019-40799-w

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© The Author(s) 2019

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Area under curve (AUC) of the CXR model. The Receiver operator characteristic (ROC) curve of the derivation cohort (a) and the validation cohort (b). The area under the ROC curve was derived as 0.698 (95% CI = 0.579 to 0.817) for score of score of [CXR + Hypoalbuminemia] model and 0.972 (95% CI = 0.927 to 1.000) for score of HRCT model in derivation cohort. They are under of the ROC curve was derived as 0.677 (95% CI = 0.586 to 0.769) for score of [hypoalbuminemia + CXR] model and 0.964 (95% CI = 0.913 to 1.000) for Score of HRCT model.