Table 3.

ASAS classification criteria for peripheral spondyloarthritis [3,5].

Peripheral arthritis (usually asymmetric inflammation of joints within lower extremities, enthesitis, dactylitis – "sausage fingers") plus ≥1 of SpA symptoms or ≥2 other SpA symptoms
≥1 SpA feature:	≥2 other SpA features:
Psoriasis	Arthritis
CD or UC	Enthesitis
Preceding infection	Dactylitis/sausage-like toe or digit
HLA-B27	Inflammatory back pain
Uveitis	Family history of SpA
Sacroiliitis on X-ray or MRI