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. 2017 Apr 20;18:165. doi: 10.1186/s12891-017-1468-6

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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. 8 — Begg’s funnel plots for assessment of publication bias. Each circle demonstrates study included in meta-analysis. 95% CI lines shown in fixed effects models. a Osteonecrosis of any grade at two or more years following open or closed reduction. b Osteonecrosis of any grade II or worse at two or more years following open or closed reduction. c Osteonecrosis of any grade II or worse at two or more years following closed reduction. d Osteonecrosis of any grade II or worse at two or more years following open reduction. e Osteonecrosis of any grade at two or more years following closed reduction. f Osteonecrosis of any grade at two or more years following open reduction