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. 2014 Dec 30;14:25. doi: 10.1186/s12873-014-0025-y

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© Pereira et al.; licensee BioMed Central. 2014

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. 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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Frequency of moderate or severe pain (pain score ≥4) by region for adults age 18–64 years vs. adults age ≥65 years. Percentages for older patients are in bold. Areas of circles are proportional to frequency of pain among older individuals.