Table 2

Progression in mSASSS over time for the total group and stratified for the presence or absence of existing syndesmophytes at baseline

		Change from baseline
	Baseline mSASSS	2 Years	4 Years
Total group (n=132)	12.8 (17.5)	2.5 (4.2)	4.2 (6.4)
Absence of baseline syndesmophytes (n=51)	1.2 (3.0)^*	0.4 (1.0)^*	0.8 (2.2)^*
Presence of baseline syndesmophytes (n=81)	20.0 (18.9)^*	3.9 (4.9)^*	6.4 (7.2)^*

Mean (SD).
↵* All values were significantly different (p<0.001) between the two groups (absence vs presence of baseline syndesmophytes).
mSASSS, modified Stoke Ankylosing Spondylitis Spine Score.