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. 2017 Oct 12;38(2):215–224. doi: 10.1177/0333102417737765

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© International Headache Society 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 4. — Proportions of patients who had sustained pain freedom and relief. (a) percentage of patients who were free from headache pain for the entire period of 2–24 hours (left panel) or 2–48 hours (right panel). (b) Percentage of patients who had pain relief for the entire period of 2–24 hours (left panel) or 2–48 hours (right panel). *p values are nominal.