Table 1.

The recently developed CASPAR (classification criteria for PsA) criteria consist of established inflammatory arthritis, defined by the presence of tender and swollen joints and prolonged morning or immobility-induced stiffness, with a total of at least 3 points from the features listed in this table

CASPAR criteria [13]
Skin psoriasis	Present	2 points
	Previously present by history	1 point
	A family history of psoriasis	1 point
Nail lesions (Onycholysis, pitting)		1 point
Dactylitis (present or past, documented by a rheumatologist)		1 point
Negative rheumatoid factor (RF)		1 point
Juxtaarticular bone formation on radiographs (distinct from osteophytes)		1 point