REUMATOLOGIE in the anti-scleroderma-70-positive patient cohort occurred approximately 5 years earlier than the ACA-positive patient group. CONCLUSIONS: This study provides data from a large cohort of SSc patients with a history of digital ulcers. The early occurrence and high frequency of digital ulcer complications are especially seen in patients with dcSSc and/or anti-scleroderma-70 antibodies. Treatment decisions and related costs differ significantly depending on the choice of a disease activity index, in rheumatoid arthritis according to 1987 and 2010 classification criteria. de Jong PH, Hazes JMW, van Zeben D, van derLubbe PA, de Jager MH, de Sonnaville PBJ, Luime J, Weel A. Rheumatology (OxFord) 2012;51(7:1269-77) PMID: 22378716. OBJECTIVE: To evaluate the therapeutic and economic consequences of various disease activity indices (DAIs) in RA according to 1987 and 2010 criteria. METHODS: Data on disease activity states from all sustained visits were assessed from all patients who participate in the treatment in the Rotterdam Early Arthritis Cohort (tREACH) study, a stratified randomized trial to evaluate different treatment strategies in patients with a symptom duration of <1 year. Frequencies of treatment adaptations, based upon exclusive thresholds of various DAIs, were visualized in reclassification tables. The Stuart-Maxwell test was applied to analyse any significant differences between treatment decisions according to the different DAIs. Simulated annual median medication costs were estimated using the tREACH medication protocol with standard national costs. RESULTS: DAIs perform similar in RA according to 1987 and 2010 criteria. A total of 1104 DASs per DAI were available from 296 patients. DAIs differ significantly, compared with DASs, in classifying a patient’s disease state. Consequently, treatment intensifications occur more frequently with SDAI, CDAI and DAS-28 usage, compared with DAS. Tapering treatment occurs less frequently with SDAI and CDAI and more frequently with DAS-28 usage. Simulated annual median medication costs are significantly higher if DAS-28, SDAI and CDAI are used compared with DAS usage. CONCLUSION: Usage of various DAIs in a single patient leads to inconsistent disease state categorizations. Consequently, these inconsistencies significantly influence therapeutic decisions and accompanying costs. As DAI usage is imperative to uphold current European League Against Rheumatology (EULAR) treatment recommendations, physicians should consider these therapeutic and economic consequences before choosing a particular DAI. In vitro glucocorticoïd sensitivity is associated with clinical glucocorticoïd therapy outcome in rheumatoid arthritis. Quax R, Koper JW, de Jong P, van Heerebeek R, Weel A, van Zeben D, huisman AM, (et al). Arthritis Res Ther 24 augustus 2012; 14(4):R195. PMID: 22920577. INTRODUCTION: Genetic and disease-related factors give rise to a wide spectrum of glucocorticoid (GC) sensitivity in rheumatoid arthritis (RA). In clinical practice, GC treatment is not adapted to these differences in GC sensitivity. In vitro assessment of GC sensitivity before the start of therapy could allow more individualized GC therapy. The aim of the study was to investigate the association between in vitro and in vivo GC sensitivity in RA. 83 WETENSCHAPPELIJK jaarverslag 2012 Pagina 82

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