Variable | Patients with AS with Vertebral Fracture, median (range)/mean ± SD/n (%) | Patients with AS without Vertebral Fracture, median (range)/mean ± SD/n (%) | Significance, 2-tailed, p |
---|---|---|---|
Age, yrs | 58 (31, 74) | 49 (17, 78) | 0.004 |
Symptom duration, yrs | 29 (9, 51) | 22 (2, 52) | 0.046 |
Duration since diagnosis, yrs | 20 (2, 40) | 11 (1, 47) | 0.011 |
Women in menopause | 9/9 (100) | 36/78 (46) | 0.003 |
Ongoing smoking | 6/24 (25) | 18/162 (10) | 0.032 |
mSASSS, score | 11.5 (0, 70) | 4.5 (0, 72) | 0.035 |
BAS-G2, score | 4.7 (0.8, 9.7) | 3.0 (0, 9.6) | 0.032 |
BASMI, score | 3.8 (1.4, 7.0) | 2.8 (0.6, 7.4) | 0.011 |
Stibor test | 6.2 (1.5, 9.5) | 7.2 (0, 13.5) | 0.036 |
Fleche test | 5.0 (2.0, 12.0) | 4.0 (0, 16.0) | 0.011 |
Cervical rotation | 60 (7.5, 82.5) | 65 (0.0, 100.0) | 0.05 |
Thoracic flexion | 1.2 (0.0, 3.5) | 2.0 (0.0, 6.0) | 0.006 |
Chest expansion | 5.0 (2.5, 8.0) | 6.0 (3.0, 11.0) | 0.016 |
Schober | 3.2 (0.5, 6.0) | 4.0 (0.0, 7.0) | 0.008 |
AP lumbar BMD, g/cxm2 | 0.943 ± 0.146 | 1.034 ± 0.173 | 0.015 |
Lateral lumbar BMD, g/cm2 | 0.646 ± 0.145 | 0.736 ± 0.131 | 0.002 |
Lumbar vBMD, g/cm3 | 0.169 ± 0.037 | 0.195 ± 0.031 | < 0.001 |
Femoral neck BMD, g/cm2 | 0.693 ± 0.123 | 0.797 ± 0.127 | < 0.001 |
Total hip BMD, g/cm2 | 0.845 ± 0.130 | 0.951 ± 0.138 | 0.001 |
Total radius BMD, g/cm2 | 0.567 ± 0.083 | 0.611 ± 0.078 | 0.012 |
AS: ankylosing spondylitis; BASMI: Bath Ankylosing Spondylitis Metrology Index; BAS-G2: Bath Ankylosing Spondylitis patient global score (6 months); mSASSS: modified Stoke Ankylosing Spondylitis Spine Score; BMD: bone mineral density (areal); AP: anteroposterior; vBMD: volumetric bone mineral density.