A critical overview of the imaging arm of the ASAS criteria for diagnosing axial spondyloarthritis: what the radiologist should know.

MRI findings of active and chronic sacroiliitis in light of recent ASAS criteria for diagnosing axial spondyloarthritis: what the radiologist should know

The performance of different classification criteria sets for spondyloarthritis in the worldwide ASAS-COMOSPA study

BACKGROUND In this study, we sought to compare the performance of spondyloarthritis (SpA) classification criteria sets in an international SpA cohort with patients included from five continents around the world. METHODS Data from the (ASAS) COMOrbidities in SPondyloArthritis (ASAS-COMOSPA) study were used. ASAS-COMOSPA is a multinational, cross-sectional study with consecutive patients diagno...

The development of Assessment of SpondyloArthritis international Society classification criteria for axial spondyloarthritis (part II): validation and final selection.

OBJECTIVE To validate and refine two sets of candidate criteria for the classification/diagnosis of axial spondyloarthritis (SpA). METHODS All Assessment of SpondyloArthritis international Society (ASAS) members were invited to include consecutively new patients with chronic (> or =3 months) back pain of unknown origin that began before 45 years of age. The candidate criteria were first teste...

How should we diagnose spondyloarthritis according to the ASAS classification criteria: a guide for practicing physicians.

The Assessment of SpondyloArthritis International Society (ASAS) group has recently developed criteria to classify patients with axial SpA with or without radiographic sacroiliitis, and criteria to classify patients with peripheral SpA. The ASAS axial criteria consist of 2 arms and can be applied in patients with back pain (>3 months almost every day). In one arm, imaging (radiographs and magne...

Evaluation of multiple referral strategies for axial spondyloarthritis in the SPondyloArthritis Caught Early (SPACE) cohort

BACKGROUND Several models have been proposed to refer patients with possible axial spondyloarthritis (axSpA) to a rheumatologist. Our aim was to evaluate performance of these models in a single cohort. METHODS 13 referral models found in the literature were evaluated in the Leiden SPondyloArthritis Caught Early (SPACE) cohort, which includes patients with back pain (≥3 months, ≤2 years, onset...