Demographic data. Values are n (%) or median (interquartile range).
| Variables | Met ILAR Criteria, n = 372 | CARRA Legacy Systemic JIA Cohort, n = 528 |
|---|---|---|
| Male | 173 (46.5) | 237 (44.9) |
| Non-Hispanic | 325 (87.4) | 460 (87.1) |
| Race | ||
| White | 296 (79.6) | 403 (76.3) |
| African American | 37 (9.9) | 61 (11.6) |
| Other | 39 (10.5) | 59 (11.2) |
| Age at onset, yrs | 4.6 (2.3–9.4) | 4.7 (2.3–9.3) |
| Disease duration, yrs | 3.7 (1.1–7.5) | 3.9 (1.1–7.7) |
| Onset calendar yr | 2008 (2004–2010) | 2008 (2004–2010) |
ILAR: International League of Associations for Rheumatology; CARRA: Childhood Arthritis and Rheumatology Research Alliance; JIA: juvenile idiopathic arthritis.