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Cortical hand bone loss after one year in early rheumatoid arthritis predicts radiographic hand joint damage at 5 and 10 year follow-up.
  1. Mari Hoff (mari.hoff{at}
  1. St. Olavs Hospital, Norwegian University of Science and Technology, Trondheim, Norway
    1. Glenn Haugeberg (glenn.haugeberg{at}
    1. Sørlandet Hospital, Norwegian University of Science and Technology, Trondheim, Norway
      1. Sigrid Ødegård (sigrid.odegard{at}
      1. Diakonhjemmet Hospital, Norway
        1. Silje W Syversen (siljew.syversen{at}
        1. Diakonhjemmet Hospital, Norway
          1. Robert Landewé (rlan{at}
          1. University of Maastricht, Netherlands
            1. Désirée van der Heijde (d.vanderheijde{at}
            1. Leiden University Medical Center, Netherlands
              1. Tore K Kvien (t.k.kvien{at}
              1. Diakonhjemmet Hospital, Norway


                Objective: To examine one year hand bone loss in early Rheumatoid Arthritis (RA) as a predictor of radiographic damage at 5 and 10 years follow-up.

                Methods: 136 RA patients (disease duration 0-4 years) were followed for 10 years with clinical data and hand radiographs. Joint damage was scored according to the van der Heijde modification of the Sharp method (vdH Sharp score) and hand bone mineral density (BMD) was measured by digital x-ray radiogrammetry (DXR). Group comparisons, correlation analyses and multivariate analyses were performed to evaluate the relationship between hand bone loss and radiographic joint damage.

                Results: Patients with hand BMD loss at 1 year had a higher median increase in vdH Sharp score compared to patients without loss at both 5 (12 vs. 2, p=0.001) and 10 years (22 vs. 4, p=0.002). In a linear regression model adjusting for age, gender, baseline CRP, anti-CCP, IgM RF and radiographic damage, absolute hand DXR-BMD loss at one year was an independent predictor of radiographic outcome at both 5 (p<0.01) and 10 year (p=0.02). In a logistic regression model the odds ratio (95% CI) for radiographic progression among patients with hand BMD loss was 3.5 (1.4-8.8) and 3.5 (1.4-8.4) at 5 and 10 years, respectively.

                Conclusion: Early hand bone loss measured by DXR-BMD was an independent predictor of subsequent radiographic damage. Our findings support that quantitative hand bone loss in RA precedes radiographic joint damage and may be used as a tool for assessment of bone involvement in RA.

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