Rheumatology · Dermatology
CASPAR Criteria for Psoriatic Arthritis calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
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Clinical inputs
- Current psoriasis, personal history, or family history
- Typical psoriatic nail dystrophy (+1)
- Negative rheumatoid factor (+1)
- Current dactylitis or history of dactylitis (+1)
- Radiographic juxta-articular new bone formation (+1)
Primary source
Taylor W et al. Classification criteria for psoriatic arthritis: development of new criteria from a large international study. Arthritis Rheum. DOI: 10.1002/art.21972. PMID: 16871531. Scope: in established inflammatory articular disease, CASPAR awards current psoriasis +2 (or personal/family history +1), nail dystrophy +1, negative RF +1, dactylitis +1, and juxta-articular new bone formation +1; score ≥3 classifies PsA. (2006)
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