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. 2017 May 22;15:110. doi: 10.1186/s12955-017-0681-1

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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 — Bland Altman plots showing the agreement of PDQ scores between test and retest. ‘In total’ refers to the total of all scores across diagnoses. The square in bold in the diagram showing ‘in total’ represents two patients