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. 2017 Aug 11;1(1):e000093. doi: 10.1136/bmjpo-2017-000093

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This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 4.0) license, which permits others to distribute, remix, adapt and build upon this work, for commercial use, provided the original work is properly cited. See: http://creativecommons.org/licenses/by/4.0/

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Bar chart showing the percentage of children who frequently complained of pain at age 11 years by maternal education level. GCSE, General Certificate of Secondary Education.