Subject characteristics (n=54)
| Value | Range | |
| Age, years | 46.4±10.9 | 24–69 |
| Men | 47 (87) | |
| Duration of AS, years | 19.0±11.4 | 2–53 |
| HLA-B27 present | 40 (85)* | |
| Bath AS Functional Index (0–100) | 27.5±23.4 | 0–89.0 |
| Bath AS Disease Activity Index (0–10) | 2.9±2.0 | 0–7.3 |
| Peripheral arthritis | 7 (13) | |
| Hip or shoulder involvement | 6 (11) | |
| Median Lumbar modified Stoke AS Spine score (0–36) | 4 | 0–26 |
| Radiographic lumbar syndesmophytes | 41 (76) |
Plus-minus values are mean±SD; other values are number (per cent).
*Of 47 subjects tested.
AS, ankylosing spondylitis.