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. 2018 Jul 11;13:173. doi: 10.1186/s13018-018-0883-1

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© The Author(s). 2018

Open Access This 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. 2 — Receiver operating characteristics (ROC) curves for plasma D-dimer in the diagnosis of DVT. The AUCs of plasma D-dimer at 4 h after surgery, POD1, and POD4 were 0.547 (p = 0.42), 0.58 (p = 0.17), and 0.635 (p = 0.02), respectively. AUC, area under curve