Analysis of patients with rheumatoid arthritis and higher radiographic progression: association of very high radiographic progression but not of intermediately high with worsening of patient-related outcomes.

Objectives: To analyse rheumatoid arthritis (RA)-patients depending on their individual peak radiographic progression.

Methods: We selected for the individual peak radiographic progression (Δ Ratingen scores/time) in patients of the Swiss registry SCQM. The baseline disease characteristics were compared using standard descriptive statistics.

Intercentre variance in patient reported outcomes is lower than objective rheumatoid arthritis activity measures: a cross-sectional study.

Objective: To assess intercentre variability in the ACR core set measures, DAS28 based on three variables (DAS28v3) and Routine Assessment of Patient Index Data 3 in a multinational study.

Methods: Seven thousand and twenty-three patients were recruited (84 centres; 30 countries) using a standard protocol in the Quantitative Standard Monitoring of Patients with RA study. Analysis of variance (ANOVA) and mixed-effect analysis of covariance models were used to model the relationship between study centre and different patient-reported and physician-reported RA activity measures.