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. 2017 May 2;3:2333721417708071. doi: 10.1177/2333721417708071

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page(https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 1. — Comparison of indexes of HRV (a-c), HR (d) and respiratory rate (e) in the supine, left lateral decubitus, and right lateral decubitus positions.

Note. The asterisks indicate statistical significance between two positions. As for nonparametric analysis of LF/HF (c), a p value of .0167 or lower was considered statistically significant, using Bonferroni correction as a post hoc test after the Friedman test. HRV = heart rate variability; HR = heart rate; LF = low frequency; HF = high frequency; LF/HF = the ratio of LF to HF; bpm = beats per minute.