Table 2

 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)

MeanSDMedian25th Centile75th Centile
Modified SASSS, modified Stoke Ankylosing Spondylitis Spinal Score; SD, standard deviation.
Paired reading order
1 Year13.618.
2 Years14.
Progression after 1 year0.
Progression after 2 years1.
Chronological reading order
1 Year14.919.
2 Years15.820.
Progression after 1 year1.
Progression after 2 years2.