Supplementary Table 2.

Percentages of CD8⁺ CD28^- T cells in patients with ankylosing spondylitis, classified according to the grade of their movement restriction

	CD8+ CD28- T cells in patients (%)
	Minor	Mean	Major
Cervical rotation (sitting)	34.2 ± 17.3	45.0 ± 18.1	44.1 ± 16.3
Cervical rotation (lying)	36.9 ± 18.1	48.8 ± 15.3	44.7 ± 15.6
Tragus to wall	44.1 ± 17.2	41.8 ± 18.0	44.4 ± 16.5
Chin to jugulum	34.7 ± 18.2	43.5 ± 17.5	45.1 ± 16.3
Head to wall	39.8 ± 16.8	44.6 ± 18.6	40.5 ± 18.6
Chest expansion	35.5 ± 15.0	43.7 ± 18.9	43.2 ± 17.6
Thoracic Schober	39.3 ± 16.6	41.4 ± 18.7	42.8 ± 17.9
Modified Schober	41.0 ± 18.3	45.2 ± 15.3	43.7 ± 17.7
Lumbar side flexion	39.3 ± 16.3	45.5 ± 18.1	44.6 ± 16.9
Fingers to floor	36.8 ± 16.4	42.8 ± 18.8	43.9 ± 17.8
Intermalleolar distance	39.8 ± 17.4	44.5 ± 16.9	45.2 ± 17.2

Patients were grouped in those with minor restrictions (head-to-wall distance <5, chin-to jugulum distance <3, cervical rotation in sitting position >70, thoracic Schober >32, chest expansion >6 and fingers-to-floor distance <20), those with mean restrictions, and those with major restrictions (head-to-wall distance >20, chin-to-jugulum distance >6, cervical rotation in sitting position <15, thoracic Schober <30.5, chest expansion <2 and fingers-to-floor distance >50). Correlations between the level of CD8⁺ CD28^- T cells and the extent of movement restrictions were not significant (using Bonferroni adjustment after Pearson test).