Table 1.
Enthesitis-related arthritis (ERA) patients’ and disease characteristics (n = 73)
| Characteristics | N (%) |
|---|---|
| Demographic characteristics | |
| Male sex | 63 (86) |
| Age at onset, mean ± SD years | 11.0 ± 3.2 |
| Age at follow-up visit, mean ± SD years | 17.6 ± 5.4 |
| Disease duration at follow-up visit, mean ± SD years | 6.5 ± 5.0 |
| Disease characteristics | |
| Enthesitis and arthritis | 71 (97) |
| Presence of HLA-B27 antigen | 67 (97a) |
| Clinical or radiographic evidence of sacroiliitis | 12 (16) |
| Onset of arthritis in a male > 6 years old | 68 (93) |
| Acute (symptomatic) anterior uveitis | 7 (10) |
| History of AS/ERA/sacroiliitis with inflammatory bowel disease, Reiter’s syndrome, or acute anterior uveitis in a 1st degree relative | 8 (11) |
| Pauciarticular (≤ 4 joints) onset | 71 (97) |
| Genetic marker with HLA-B 27 subtypesb | |
| B*27:04 | 23 (92) |
| B*27:05 | 2 (8) |
aonly 69 patients underwent HLA-B27 testing
bonly 25 HLA-B27-positive patients underwent subtype testing