Mean (SD) changes in syndesmophyte circumferential height over 1 and 2 years in absolute and percentage terms. Values are mean (SD) unless otherwise specified.
| Characteristics | Per IDS | Per Patient | ||||
|---|---|---|---|---|---|---|
| n | Baseline to Yr 1 | Baseline to Yr 2 | n | Baseline to Yr 1 | Baseline to Yr 2 | |
| Original unit | 132 | 0.63 (1.32) | 1.14 (2.16) | 33 | 2.52 (3.46) | 4.57 (5.35) |
| Percentage* | 81 | 10.7 (26.1) | 17.4 (30.8) | 24 | 10.2 (11.7) | 16.1 (14.0) |
↵* Percentage change can only be computed for IDS and patients with baseline syndesmophyte measures larger than 0. IDS: intervertebral disc space.