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. 2018 Jul 31;6:44. doi: 10.1186/s40560-018-0313-9

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© The Author(s). 2018

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 — ROC curves for LTC (a), RR (b), RSBI (c), APACHE II score (d), HR (e), and TV (f) used to distinguish the success group from the failure group. In the ROC curve analysis, the AUC was highest for LTC (0.862), followed by the RR (0.821), RSBI (0.781), APACHE II score (0.720), HR (0.715), and TV (0.695). ROC curve: receiver operating characteristic curve; LTC: lung-thorax compliance; RR: respiratory rate; RSBI: rapid shallow breathing index; APACHE II score: Acute Physiology and Chronic Health Evaluation II score; TV: tidal volume; AUC: area under the curve, CI: confidence interval