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We included 379 patients. EFA on standard composite score components extracted 2 factors with no substantial cross-loadings. Still, pain (0.83), fatigue (0.65), and HAQ (0.59) were strongly correlated with PaGH. When rerunning the EFA with the inclusion of pain, fatigue, and HAQ, the 2-factor model had substantial cross-loadings between factors. However, a 3-factor model was optimal, with Factor 1 patient assessment, Factor 2 clinical assessment (PhGH, SJC, and TJC), and Factor 3 laboratory assessment (ESR/CRP). PaGH, pain, fatigue, an