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. 2024 Mar 15;10(1):e003741. doi: 10.1136/rmdopen-2023-003741

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© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Bland-Altman plots using C reactive protein polymyalgia rheumatica activity score (CRP-PMR-AS)* as the gold standard at inclusion for all patients (n=100). ESR, erythrocyte sedimentation rate. The y-axis represents the difference between the CRP-PMR-AS and ESR-PMR-AS (A), the difference between the CRP-PMR-AS and clin-PMR-AS (B) and the difference between the CRP-PMR-AS and imp-CRP PMR-AS (C). The 95% upper and lower limits are presented, and the mean differences and zero line are presented. PMR: polymyalgia rheumatica; AS: activity score; ESR: erythrocyte sedimentation rate; CRP: C reactive protein; clin: clinical; imp-CRP: imputed CRP