Descriptive statistics of 1 and 2 year follow up of radiological damage scored according to the modified SASSS with paired and chronological reading order (n = 166 patients)
| Mean | SD | Median | 25th Centile | 75th Centile | |
|---|---|---|---|---|---|
| Modified SASSS, modified Stoke Ankylosing Spondylitis Spinal Score; SD, standard deviation. | |||||
| Paired reading order | |||||
| Baseline | 13.1 | 18.0 | 4.9 | 0.0 | 18.1 |
| 1 Year | 13.6 | 18.4 | 4.9 | 0.0 | 21.2 |
| 2 Years | 14.1 | 18.6 | 6.0 | 0.0 | 23.3 |
| Progression after 1 year | 0.5 | 2.4 | 0.0 | 0.0 | 0.0 |
| Progression after 2 years | 1.0 | 2.9 | 0.0 | 0.0 | 1.6 |
| Chronological reading order | |||||
| Baseline | 13.6 | 19.2 | 5.0 | 0.0 | 17.0 |
| 1 Year | 14.9 | 19.7 | 6.0 | 0.0 | 20.1 |
| 2 Years | 15.8 | 20.1 | 6.0 | 0.0 | 22.7 |
| Progression after 1 year | 1.3 | 2.6 | 0.0 | 0.0 | 1.4 |
| Progression after 2 years | 2.1 | 3.9 | 0.0 | 0.0 | 3.0 |