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. 2016 Jun 3;4:32. doi: 10.1186/s40359-016-0138-z

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© The Author(s). 2016

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. 2 — A scatterplot visualising the association between HRV and worry (a), anxiety (b), stress (c), and depression (d) symptom severity. A line of best fit with 95 % confidence region was overlaid on the scatterplots to illustrate data trends. DASS A = DASS anxiety score; DASS S = DASS stress score, DASS D = DASS depression score; PSWQ = Penn State worry questionnaire score