Table 1 ILAR classification of 151 Finnish patients with JIA at 18-year follow-up
ILAR subgroup | HLA-B27 positive (% of the whole subgroup) | HLA-B27 negative (% of the whole subgroup) | n (% of total cohort) |
|---|---|---|---|
Systemic disease | 1 (3) | 0 (0) | 1 (1) |
Oligoarticular persistent | 3 (8) | 41 (36) | 44 (29) |
Oligoarticular extended | 3 (8) | 28 (25) | 31 (21) |
Polyarticular RF neg. | 9 (24) | 30 (26) | 39 (26) |
Polyarticular RF pos. | 1 (3) | 2 (2) | 3 (2) |
Psoriatic arthritis | 2 (5) | 11 (10) | 13 (9) |
Enthesitis-related arthritis | 16 (43) | 0 (0) | 16 (11) |
Undifferentiated arthritis | 2 (5) | 2 (2) | 4 (3) |
Total | 37 | 114 | 151 |