Numbers of patients with juvenile PsA according to Vancouver and ILAR criteria and reason for exclusions.
| Vancouver Criteria | Vancouver PsA | PsA | Oligoarthritis | ILAR Category | Undifferentiated | |
|---|---|---|---|---|---|---|
| Polyarthritis | ERA* | |||||
| Total no. of patients | 42 | 31 | 2 | 3 | 5 | 1 |
| No. included under ILAR criteria | 31 | 31 | ||||
| No. excluded under ILAR criteria | 11 | 2 | 3 | 5 | 1 | |
| Reason for exclusion | ||||||
| Psoriasis-like rash | 4 | 1 | 2 | 1 | ||
| B27-positive male onset-age > 6 yrs | 3 | 3 | ||||
| Psoriasis in 2nd-degree relative | 2 | 1 | 1 | |||
| Meets criteria for AS | 1 | 1 | ||||
| Positive IgM rheumatoid factor | 1 | 1 | ||||
↵* 5 patients excluded from PsA because they met inclusion criteria for ERA had psoriasis in patient or first-degree relative and thus met the criteria for more than one category. However, since they all had signs of spondyloarthropathy they were analyzed together with the ERA patients.