Association of clinical, laboratory, and radiographic features with late versus adult-onset ankylosing spondylitis. The OR corresponds to a unit-increase in the variable if not addressed.
| Feature | OR (95% CI)† |
|---|---|
| Initial symptoms/signs | |
| Inflammatory back pain | 0.29 (0.11–0.78)* |
| Peripheral arthritis | 0.96 (0.31–2.97) |
| Enthesitis | 1.46 (0.41–5.27) |
| Uveitis | 2.25 (0.70–7.18) |
| Peripheral arthritis/enthesitis only | 1.57 (0.44–5.63) |
| Outcome | OR (95% CI)†† |
| BASDAI | 0.88 (0.71–1.09) |
| BASFI | 0.89 (0.72–1.11) |
| BASMI | 1.08 (0.78–1.49) |
| BASG | 0.97 (0.82–1.14) |
| CRP > 0.5 vs ≤ 0.5 mg/dl | 0.48 (0.11–2.01) |
| ESR > 20 vs ≤ 20 mm/h | 1.30 (0.29–5.90) |
| IgA > 453 vs ≤ 453 mg/dl | 0.72 (0.09–5.88) |
| Sacroiliitis | 0.87 (0.44–1.73) |
| mSASSS cervical spine | 0.83 (0.63–1.09) |
| mSASSS lumbar spine | 0.85 (0.67–1.08) |