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. 2017 Dec 29;17:180. doi: 10.1186/s12874-017-0460-z

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© The Author(s) 2017

Open Access This 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 — Plot of Likert scales with PRISMA-A. This graph shows the frequency distributions of responses to SR reporting assessment using PRISMA for Abstracts. This graph shows frequency distributions of responses (yes, no) to the 12 items of PRISMA for Abstracts