Inflammatory bowel diseases and spondyloarthropathies: From pathogenesis to treatment

Table 1 Assessment of Spondyloarthritis International Society Classification criteria for axial spondyloarthropathy and peripheral spondyloarthropathy

Axial Spondyloarthropathy
Patients with back pain ≥ 3 months and age at onset <45 years
Sacroiliitis on imaging1 plus ≥ 1		HLA-B27 plus ≥ 2 other
Spondyloarthropahty feature	OR	Spondyloarthropahty features
(Imaging arm)		(Clinical arm)
Spondyloarthropahty features
Inflammatory back pain
Arthritis
Enthesitis (heel)
Uveitis
Dactylitis
Psoriasis
Crohn’s Disease/Ulcerative colitis
Good response to NSAIDs
Family history of spondyloarthropahty
HLA-B27
Elevated CRP
Peripheral Spondyloarthropathy
Arthritis OR Dactylitis OR Enthesitis2
PLUS
≥ 1		≥ 2
Uveitis		Arthritis
Psoriasis		Enthesitis
Inflammatory bowel disease	OR	Dactylitis
Preceding infection		IBP (past)
HLA-B27		Family history of Spondyloarthropahty
Sacroiliitis on imaging

ASAS (ASAS, Assessment of Spondyloarthritis international Society) classification criteria for axial Spondyloarthropathy (axSpA) and peripheral Spondyloarthropathy (peripheral SpA).

¹Definite radiographic sacroiliitis according to the modified New York criteria or positive sacroiliac magnetic resonance imaging.

²Without current back pain. NSAIDS: Non-steroidal anti-inflammatories; HLA: Human leukocyte antigen; CRP: C-reactive protein; IBP: Inflammatory back pain (3,4).