| axSpA (n = 25) | MBP (n = 59) |
---|---|---|
Male gender | 15 (60%)* | 19 (32%) |
Age (years), mean (SD) | 31.6 (5.7) | 32.3 (5.8) |
HLA-B27 positivity | 18 (72%)* | 11 (19%) |
BMI (kg/m2), mean (SD) | 26.4 (4.2) | 26.5 (4.4)a |
Childbirths (number), mean (SD) if female (n = 50) | 1.6 (1.1) | 1.7 (1.2) |
Time since last childbirth (years), mean (SD) (n = 40) | 5.3 (4.2) | 4.0 (4.2) |
Fulfilment of the 2009 ASAS criteria [3] | 24 (96%)* | 36 (61%) |
Sacroiliitis according to the 2009 ASAS criteria [4] | 24 (96%) | 49 (83%) |
Inflammatory back pain (ASAS definition [3]) | 20 (80%)* | 30 (51%) |
Buttock pain | 23 (92%)* | 41 (69%) |