Table 2

Specific instruments previously selected by the ASAS Working Group18 and corresponding to the domains selected during the second turn of the Delphi technique

Patient’s global assessmentVAS, past week
Inflammatory painVAS, past week, due to AS
Functional impairmentBASFI
Refractory to NSAIDs
Laboratory parametersESR or CRP
Number of swollen joints44
Number of tender joints44
Tender enthesis
Refractory to local treatment