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. 2018 Oct 6;28(11):1417–1429. doi: 10.1007/s00787-018-1229-6

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© The Author(s) 2018

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.

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Fig. 5 — A risk-ratio plot of studies comparing proportions receiving medication for ADHD between the oldest and youngest within the school year in other countries. *Chen 2016 appears twice in this figure due to presented comparison of the oldest ¼ of the year compared with the youngest ¼ (line 5) and those born in the first month of the academic year and the last month (line 6). Pottegard 2014 appears twice in this figure due to presented comparisons of those born in the oldest 1 month and the youngest 1 month of the year (line 3) and the oldest 2 months compared with the youngest 2 months (line 1)