Table 1 The seven domains and 12 items that were selected after the Delphi exercise for inclusion in the analysis to derive a disease activity index in ankylosing spondylitis
PainPatient overall pain assessment of back, neck and hips (BASDAI question 2)
Patient total spinal pain assessment (pain spine)
Patient peripheral pain assessment (BASDAI question 3)
InflammationPatient back pain at night
Duration of morning stiffness (BASDAI question 6)
Laboratory testsCRP
Patient globalGlobal disease activity (by patient self-assessment)
Peripheral signsSwollen joint count
Tender enthesis count
FatigueFatigue level self-assessment (BASDAI question 1)
  • *BASFI was excluded after discussion among the ASAS members (see text).

  • ASAS, Assessment of SpondyloArthritis international Society; BASDAI, Bath Ankylosing Spondylitis Disease Activity Index; BASFI, Bath Ankylosing Spondylitis Functional Index; CRP, C-reactive protein; ESR, erythrocyte sedimentation rate.