Table 1 (abstract A28).
See text for description
| Characteristic | Frequency (%) or Median (25-75%) |
|---|---|
| Age at enrollment (years) | 12.0 (7.0 – 15.0) |
| Female | 4,760 (71%) |
| White Race | 5,432 (81%) |
| Private health insurance | 4,515 (67%) |
| Disease duration (years) | 2.5 (0.4 – 6.1) |
| ILAR category: | |
| Oligoarthritis, persistent | 1,634 (24%) |
| Oligoarthritis, extended | 519 (8%) |
| Polyarthritis, RF- | 2,184 (33%) |
| Polyarthritis, RF+ | 472 (7%) |
| Psoriatic arthritis | 490 (7%) |
| Enthesitis related arthritis | 687 (10%) |
| Systemic arthritis | 571 (9%) |
| Undifferentiated arthritis | 147 (2%) |
| ANA+ | 3,004 (45%) |
| RF+ | 556 (8%) |
| CCP+ | 447 (7%) |
| HLA-B27+ | 545 (8%) |
| Polyarthritis course | 4,269 (64%) |
| Uveitis, ever | 721 (11%) |
| Number of active joints | 1 (0 – 3) |
| Physician global assessment | 1 (0 – 3) |
| Active enthesitis | 469 (7%) |
| Clinically active sacroiliitis | 237 (4%) |
Clinical characteristics at enrollment (N=6,707)