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Extended report
Ankylosing Spondylitis Disease Activity Score (ASDAS): defining cut-off values for disease activity states and improvement scores
  1. Pedro Machado1,2,
  2. Robert Landewé3,
  3. Elisabeth Lie4,
  4. Tore K Kvien4,
  5. Jürgen Braun5,
  6. Daniel Baker6,
  7. Désirée van der Heijde2,4,
  8. for the Assessment of SpondyloArthritis international Society
  1. 1Rheumatology Department, Coimbra University Hospital, Coimbra, Portugal
  2. 2Rheumatology Department, Leiden University Medical Center, Leiden, The Netherlands
  3. 3Rheumatology Department, Maastricht University Medical Center, Maastricht, The Netherlands
  4. 4Rheumatology Department, Diakonhjemmet Hospital, Oslo, Norway
  5. 5Rheumatology Department, Rheumazentrum Ruhrgebiet, Herne, Germany
  6. 6Research and Development, Centocor Inc, Malvern, Pennsylvania, USA
  1. Correspondence to Professor Désirée van der Heijde, Department of Rheumatology, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands; d.vanderheijde{at}kpnplanet.nl

Footnotes

  • Competing interests None.

  • Ethics approval This study was conducted with the approval of the ASSERT trial and the NOR-DMARD registry, the two databases used in our analysis.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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Footnotes

  • Competing interests None.

  • Ethics approval This study was conducted with the approval of the ASSERT trial and the NOR-DMARD registry, the two databases used in our analysis.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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