Fig. 3From: Comprehensive assessment of alterations in hand deformities over 11 years in patients with rheumatoid arthritis using cluster analysis and analysis of covarianceTrajectory plots of swan-neck deformity scores, boutonnière deformity scores, ulnar drift scores and the Kapandji index over time. Trajectory plots of swan-neck deformity scores (a), boutonnière deformity scores (b), ulnar drift scores (c), and the Kapandji index (d). Differences between clusters are shown. Functional impairment did not worsen during the 11 years of the studyBack to article page