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. 2017 Aug 15;3(3):2055217317725917. doi: 10.1177/2055217317725917

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution 4.0 License (http://www.creativecommons.org/licenses/by/4.0/) which permits any 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 3. — Raw score to interval metric transformation.

The x-axis represents the Physical Impact construct as an interval logit score with increasing impact from left to right and the y-axis the raw score as calculated by the summed total of the Multiple Sclerosis Impact Scale (MSIS–29).