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. 2017 Feb 8;5:17. doi: 10.1186/s40560-017-0212-5

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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 — Kaplan-Meier plots showing the relationship between pain event and patient outcome. Solid lines demonstrate patients in the control group; dotted lines demonstrate patients in the pain episode group. a Mortality rate up to 30 days after the initiation of mechanical ventilation. Mortality rate was significantly lower in the control group compared to that in the pain event group (p = 0.0028, log-rank test). b Time to successful weaning from mechanical ventilation. Time to successful weaning was significantly shorter in the control group compared to that in the pain event group (p = 0.046, log-rank test). c Length of ICU stay. Length of ICU stay did not differ significantly between the two groups (p = 0.077, log-rank test)