cliot (version 1.0.0)

asas_peripheral_spa: ASAS Criteria for Peripheral Spondyloarthritis (SpA)

Description

Applies the Assessment of SpondyloArthritis international Society (ASAS) classification criteria for peripheral spondyloarthritis. These criteria are applicable to patients with peripheral arthritis, enthesitis, or dactylitis. Classification is achieved if the patient has at least one specific SpA feature (Group 1) OR at least two other SpA features (Group 2).

Usage

asas_peripheral_spa(arthritis, enthesitis, dactylitis, uveitis, psoriasis,
                    crohns_colitis, preceding_infection, hla_b27,
                    sacroiliitis_imaging, inflammatory_bp, family_history_spa)

Value

A list containing:

Classification

"Classified as Peripheral Spondyloarthritis", "Not Classified", or "Not Applicable".

Criteria_Met

Indicates which criteria set was satisfied (Group 1 or Group 2).

Arguments

arthritis

Numeric (0 or 1). Peripheral arthritis (Entry Criterion).

enthesitis

Numeric (0 or 1). Enthesitis (Entry Criterion).

dactylitis

Numeric (0 or 1). Dactylitis (Entry Criterion).

uveitis

Numeric (0 or 1). Uveitis (past or present). (Group 1 Feature).

psoriasis

Numeric (0 or 1). Psoriasis (past or present). (Group 1 Feature).

crohns_colitis

Numeric (0 or 1). Crohn's disease or ulcerative colitis (past or present). (Group 1 Feature).

preceding_infection

Numeric (0 or 1). Preceding infection (urethritis/cervicitis or diarrhea within 1 month before arthritis). (Group 1 Feature).

hla_b27

Numeric (0 or 1). Positive HLA-B27 status. (Group 1 Feature).

sacroiliitis_imaging

Numeric (0 or 1). Sacroiliitis on imaging (MRI or X-ray). (Group 1 Feature).

inflammatory_bp

Numeric (0 or 1). History of inflammatory back pain. (Group 2 Feature).

family_history_spa

Numeric (0 or 1). Family history for SpA (in first- or second-degree relative). (Group 2 Feature).

References

Rudwaleit M, van der Heijde D, Landewé R, et al. The Assessment of SpondyloArthritis international Society classification criteria for peripheral spondyloarthritis and for spondyloarthritis in general. Ann Rheum Dis. 2011;70(1):25-31. doi:10.1136/ard.2010.133645

Examples

# Example 1: Group 1 Met
# Arthritis (Entry), Psoriasis (Group 1)
asas_peripheral_spa(1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0)

# Example 2: Group 2 Met
# Enthesitis (Entry + Group 2), Family History (Group 2)
# Total Group 2 count = 2
asas_peripheral_spa(0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1)