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. 2017 Nov 16;17:153. doi: 10.1186/s12871-017-0444-x

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© The Author(s). 2017

Open AccessThis 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. 3 — Receiver operating characteristics (ROC) curve analyses to predict change of mean arterial blood pressure after thoracic epidural anesthesia. The AUC of SVV was 0.687 (95% CI, 0.587–0.787) whereas AUC of CVP (0.477 [95% CI, 0.369–0.584]). The performance to predict 20% change of mean arterial pressure was significantly different (P = 0.026). The optimal cutoff value of SVV to discriminate between responders and non-responders was 9.5% (sensitivity: 60.6%, specificity: 68.9%)