Demographic and clinical features of AS patients according to radiographic progression.
| Features | Slow Progression | Rapid Progression | p |
|---|---|---|---|
| No. women/men | 85/88 | 15/47 | 0.001 |
| Mean age, yrs, ± SD | 37.5 ± 11.0 | 44.0 ± 9.4 | 0.07 |
| Mean age at onset, yrs, ± SD | 27.2 ± 9.7 | 27.5 ± 9.9 | 0.36 |
| Mean disease duration, yrs, ± SD | 10.6 ± 8.5 | 12.8 ± 8.7 | 0.09 |
| Delay in diagnosis, yrs, ± SD | 6.4 ± 7.1 | 7.8 ± 7.1 | 0.08 |
| HLA-B27, % | 63 | 86 | 0.005 |
| Peripheral arthritis, % | 47 | 21 | 0.001 |
| Enthesitis, % | 54 | 24 | 0.001 |
| Hip involvement, % | 53 | 46 | 0.35 |
| Uveitis, % | 20 | 28 | 0.26 |