Table 2.

The CASPAR criteria for Psoriatic Arthritis. Modified from [50]. A patient must have inflammatory articular disease (joint, spine, or entheseal) with three or more points from the following five categories

Evidence of current psoriasis (psoriatic lesions on the skin judged by the rheumatologist of dermatologist); personal or family (presence of psoriasis in 1° or 2° degree relative) history – 1 point; current psoriasis – 2 points
Psoriatic nail dystrophy (onycholysis, pitting and hyperkeratosis) on current physical examination – 1 point
Rheumatoid factor (RF) – negative by any method except latex, but preferably ELISA or nephelometry – 1 point
Dactylitis defined as swelling of the entire digit (sausage-like appearance) current or on history of dactylitis as recorded by the rheumatologist – 1 point
Radiographic evidence of bone proliferation seen as ill-defined ossification near joint margins but excluding osteophyte formation on plain X-rays of the hand or foot – 1 point