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. 2019 Nov 28;5(2):e001050. doi: 10.1136/rmdopen-2019-001050

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© Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution 4.0 Unported (CC BY 4.0) license, which permits others to copy, redistribute, remix, transform and build upon this work for any purpose, provided the original work is properly cited, a link to the licence is given, and indication of whether changes were made. See: https://creativecommons.org/licenses/by/4.0/.

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Longitudinal association between RAPID3 and DAS28-ESR over time (N=207). Longitudinal GEE model with autoregression. RAPID3 0–30 converted to a 0–10 scale; high numbers reflect worse outcome. RAPID3 domains: functioning, pain and patient global assessment; DAS28 (four variables, erythrocyte sedimentation rate-based). DAS28, Disease Activity Score in 28 joints; DAS28-ESR, Disease Activity Score in 28 joints that includes the erythrocyte sedimentation rate; GEE, generalised estimating equation; RAPID3, Routine Assessment of Patient Index Data 3.