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. 2018 Mar 5;11:1756286418759974. doi: 10.1177/1756286418759974

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© The Author(s), 2018

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 1. — Correlations between CSA in MRN and HRUS (all values in mm²) and Bland–Altmann plots for the median, ulnar and radial nerve in the upper arm and the fibular nerve.

HRUS-CSA values for all nerves correlated with MRN values for all nerves measured (right side). The Bland–Altman plots (left side) show a negative mean bias (bias = HRUS-CSA − MRN-CSA) between −0.6 and −3.2. These results indicate a fair degree of correlation between the variables with MRN-CSA values being more frequently higher than HRUS-CSA values. Random error is lower for the radial and higher for the fibular nerve. (a) Dashed line, mean bias in Bland–Altman plots; solid line, ±1.96 SD (95% CI).

CSA, cross-sectional area; HRUS, high-resonance nerve ultrasound; magnetic resonance neurography.