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. 2022 Nov 2;13:1016072. doi: 10.3389/fendo.2022.1016072

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Copyright © 2022 Worth, Dunne, Salomon-Estebanez, Harper, Nutter, Dastamani, Senniappan and Banerjee

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Scatter plot of absolute relative difference (ARD) between CGM and SMBG by glucose value. Yellow line = linear line of best fit, red line = 2^nd degree polynomial line of best fit, black dotted line = mean absolute relative difference (MARD). Figure i) shows a linear negative correlation between glucose value and ARD with ARD decreasing as glucose increases. However, the 2^nd degree polynomial shows a U shaped curve with the greatest accuracy in the normal glucose range from 5-9mmol/L. When the two hyperglycaemia outliers (red) are removed, the relationships are not significantly altered (ii).