Table 1 Demographics of total population and subjects with (+) sacroiliitis
Total subjects (n = 50 subjects, 76 exams) | Subjects with sacroiliitis (n = 32 subjects, 48 exams) | |
|---|---|---|
n (%) | n (%) | |
Age (years) | Mean ± SD = 13.3 ± 2.9 | Mean ± SD = 13.7 ± 2.6 |
5-8 | 3 (6) | 1 (3) |
9-12 | 17 (34) | 11 (34) |
13-16 | 26 (52) | 17 (53) |
>17 | 4 (8) | 3 (10) |
Gender | ||
Male | 35 (70) | 23 (71) |
Female | 15 (30) | 9 (29) |
Race | ||
White, non-Hispanic | 33 (66) | 21 (66) |
African American | 8 (4) | 2 (6) |
Asian | 3 (6) | 2 (6) |
Hispanic | 9 (18) | 6 (19) |
Other | 3 (6) | 1 (3) |
HLA-B27 (+) | 23 (46) | 13 (41) |
≥1 elevated inflammatory marker† | 37 (49) | 24 (50) |
MRI (+) hip arthritis | 23 (45) | 19 (79) |
MRI (+) pelvic enthesitis | 17 (22) | 15 (31) |