Features of criteria | Modified New York criteria | Amor criteria | ESSG criteria | ASAS axial SpA criteria | ASAS peripheral SpA criteria |
Year of publication | 1984 | 1990 | 1991 | 2009 | 2011 |
Inclusion or entry criteria | Sacroiliitis on radiograph* plus ≥1 clinical criterion | None, fulfillment of criteria requires a score of ≥6 points, assigned on the basis of clinical features that are considered from the list below; weightings for each feature are shown in parentheses | Either IBP or synovitis (asymmetric or predominantly of the lower limbs), plus at least one other SpA feature | ≥3 months' back pain before age 45 years and either sacroiliitis on imaging (radiographs or MRI) plus ≥1 other SpA feature (imaging arm) or HLA-B27-positive plus ≥2 other SpA features (clinical arm) | Arthritis, enthesitis or dactylitis plus ≥1 SpA feature marked witha or ≥2 other SpA features marked withb |
SpA features to be considered |
IBP¶ | √ | X | X | √ | √ (ever)b |
Alternating buttock pain | X | √ or gluteal pain (1 point) | √ | X | X |
Pain at night or morning stiffness | X | √ (1 point) | X | X | X |
Arthritis | X | √ asymmetrical oligoarthritis (2 points) | X | √ | √b |
Dactylitis | X | √ (2 points) | X | √ | √b |
Enthesitis (heel) | X | √ (2 points) | √ | √ | √b |
Good response to NSAIDs | X | √ (2 points) | X | √ | X |
Psoriasis | X | √ (2 points)Δ | √ | √ | √a |
Inflammatory bowel disease | X | √ (2 points)Δ | √ | √ | √a |
Balanitis | X | √ (2 points)Δ | X | X | X |
Uveitis | X | √ (2 points) | X | √ | √a |
Diarrhea <1 month before onset arthritis | X | √ (1 point) | √◊ | X | X |
Urethritis/cervicitis <1 month before onset arthritis | X | √ (1 point) | √◊ | X | X |
Preceding infection | X | X | X | X | √a |
Positive family history for SpA§ | X | √ (2 points)¥ | √ | √ | √b |
HLA-B27 | X | √ (2 points)¥ | X | √ | √a |
Elevated CRP | X | X | X | √ | X |
Sacroiliitis | Not applicable (see: 'Inclusion or entry criteria' above) | √ (radiographic*; 3 points) | √ (radiographic*) | Not applicable (see: 'Inclusion or entry criteria' above) | √a (radiographic* or MRI-detected) |
Limitation in mobility of lumbar spine | √ | X | X | X | X |
Limitation in chest expansion | √ | X | X | X | X |