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      Calc Function

    • Calcs that help predict probability of a diseaseDiagnosis
    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
    • Suggested protocolsAlgorithm





    Chief Complaint


    Organ System


    Patent Pending

    ASAS Criteria for Peripheral SpondyloArthritis (SpA)

    Diagnoses peripheral spondyloarthritis according to Assessment of SpondyloArthritis International Society (ASAS) criteria.
    When to Use
    • Patients with peripheral arthritis in whom spondyloarthritis is in the differential diagnosis.

    • May be used in conjunction with ASAS Criteria for Axial SpA (use Axial criteria in patients with back pain with or without peripheral manifestations, and Peripheral criteria in patients with peripheral manifestations only).

    Entry criterion

    ≥1 of the following:

    Diagnostic Result:

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    Next Steps
    Creator Insights


    With the limited data on peripheral spondyloarthritis, an international task force recommends targeting treatment to remission or low disease activity (Smolen 2017). 

    About the Creator
    Dr. Martin Rudwaleit
    Are you Dr. Martin Rudwaleit?