Calc Function

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    • Subcategory of 'Diagnosis' designed to be very sensitiveRule Out
    • Disease is diagnosed: prognosticate to guide treatmentPrognosis
    • Numerical inputs and outputsFormula
    • Med treatment and moreTreatment
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    Attention COACH STUDY participants:

    The principal investigators of the study request that you use the official version of the modified score here.

    Leiden Clinical Prediction Rule for Undifferentiated Arthritis

    Diagnoses rheumatoid arthritis in patients with recent-onset undifferentiated arthritis.
    When to Use

    Do you use the Leiden Rule for Undifferentiated Arthritis and want to contribute your expertise? Join our contributor team!

    years
    Male
    0
    Female
    +1
    Small joints in hands/feet
    +0.5
    Upper extremities only
    +1
    Upper and lower extremities
    +1.5
    Other
    0
    No
    0
    Yes
    +0.5
    <30 min
    0
    30-59 min
    +0.5
    ≥60 min
    +1
    <4
    0
    4-10
    +0.5
    ≥11
    +1
    <4
    0
    4-10
    +0.5
    ≥11
    +1
    <5
    0
    5-50
    +0.5
    ≥51
    +1.5
    Negative
    0
    Positive
    +1
    Negative
    0
    Positive
    +2

    Result:

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    Next Steps
    Evidence
    Creator Insights
    Dr. Annette H. van der Helm-van Mil

    About the Creator

    Annette H. van der Helm-van Mil, MD, PhD, is a professor in the rheumatology department at Leiden University Medical Center, Netherlands. She is also a professor at Erasmus Medical Center in Rotterdam, Netherlands. Dr. van der Helm-van Mil’s primary research is focused on early arthritis, arthralgia, and imaging.

    To view Dr. Annette H. van der Helm-van Mil's publications, visit PubMed

    Are you Dr. Annette H. van der Helm-van Mil? Send us a message to review your photo and bio, and find out how to submit Creator Insights!
    MDCalc loves calculator creators – researchers who, through intelligent and often complex methods, discover tools that describe scientific facts that can then be applied in practice. These are real scientific discoveries about the nature of the human body, which can be invaluable to physicians taking care of patients.
    About the Creator
    Dr. Annette H. van der Helm-van Mil
    Are you Dr. Annette H. van der Helm-van Mil?