|
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%)
|
