title: Adalimumab effectiveness for the treatment of ankylosing spondylitis is maintained for up to 2 years: long-term results from the ATLAS trial.
abstract: OBJECTIVE
  To determine the long-term effect of adalimumab on patients with ankylosing spondylitis (AS) who participated in the Adalimumab Trial Evaluating Long-Term Efficacy and Safety in AS (ATLAS), a randomised, double-blind, placebo controlled, 24-week trial.
  
  
  METHODS
  Patients received adalimumab 40 mg every other week (eow) or placebo for 24 weeks in ATLAS. At week 24, patients were switched to open-label adalimumab 40 mg eow. Efficacy measures included 20% improvement in the Assessment in SpondyloArthritis International Society (ASAS) criteria (ASAS20), ASAS40 and ASAS partial remission responses and changes in individual components of the ASAS20 response evaluations, for example, Bath AS Functional Index (BASFI) and Bath AS Disease Activity Index (BASDAI). Two-year interim data were analysed based on the total duration of adalimumab exposure, irrespective of the treatment randomisation group.
  
  
  RESULTS
  At 2 years, 255 (82.0%) of the original 311 ATLAS patients continued receiving adalimumab treatment. Improvements in ASAS responses observed in ATLAS were sustained during long-term treatment; 64.5% (200/310) were ASAS20 responders, 50.6% (157/310) were ASAS40 responders and 33.5% (104/310) had maintained ASAS-defined partial remission. Changes in individual ASAS response components were sustained or improved during long-term adalimumab treatment. From ATLAS baseline to 2 years of adalimumab exposure, respectively, BASDAI improved from 6.3 (SD 1.7) to 2.4 (SD 2.3) and BASFI improved from 5.2 (SD 2.4) to 2.9 (SD 2.5). Adalimumab was well tolerated. No cases of tuberculosis, congestive heart failure, lupus-like symptoms, or demyelinating disease were reported.
  
  
  CONCLUSIONS
  Adalimumab reduced the signs and symptoms of AS and induced partial remission for up to 2 years. The long-term safety profile was similar to the short-term safety profile. Trial registration information: NCT00085644.
authors.affiliation: Department of Rheumatology, Leiden University Medical Center, The Netherlands. d.vanderheijde@kpnplanet.nl
authors.forename: D
authors.initials: D
authors.lastname: van der Heijde
authors.forename: M H
authors.initials: MH
authors.lastname: Schiff
authors.forename: J
authors.initials: J
authors.lastname: Sieper
authors.forename: A J
authors.initials: AJ
authors.lastname: Kivitz
authors.forename: R L
authors.initials: RL
authors.lastname: Wong
authors.forename: H
authors.initials: H
authors.lastname: Kupper
authors.forename: B A C
authors.initials: BA
authors.lastname: Dijkmans
authors.forename: P J
authors.initials: PJ
authors.lastname: Mease
authors.forename: J C
authors.initials: JC
authors.lastname: Davis
mesh_terms: D000068879:Adalimumab; D000293:Adolescent; D000328:Adult; D000368:Aged; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D061067:Antibodies, Monoclonal, Humanized; D018501:Antirheumatic Agents / Q000627:therapeutic use*; D004311:Double-Blind Method; D005260:Female; D005500:Follow-Up Studies; D006305:Health Status Indicators; D006801:Humans; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D012074:Remission Induction; D013131:Spine / Q000503:physiopathology; D013167:Spondylitis, Ankylosing / Q000188:drug therapy* / Q000503:physiopathology; D016896:Treatment Outcome
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D018501:Antirheumatic Agents; D000068879:Adalimumab