Examples of objective inflammation measuresElevation of CRP above the upper limit of normal and/or sacroiliitis on MRI (nr-axSpA)
Psoriasis response measureReduction in body surface area (BSA) affected from baseline or improvement in signs/symptoms (itching, redness, flaking, scaling, burning, cracking, pain)
Arthritis/joint countsImprovement in number of swollen joints, number of tender joints, enthesitis, and dactylitis for PsA; counts of active joints for ERA
Axial disease measuresImprovement in functional status, total spinal pain, or inflammation (e.g., morning stiffness) for AS/axial spondyloarthritis
HS response measuresReduction in abscess/inflammatory nodule count, decreased frequency of inflammatory lesions, reduced formation of new sinus tracts/scarring, reduced pain or suppuration, improved quality of life