|
Age, years
|
43.0 (12.6)
|
41.4 (10.2)
|
43.4 (13.13)
|
0.21
|
|
Gender, female
|
59 (30.1 %)
|
17 (40.5 %)
|
42 (27.3 %)
|
0.10
|
|
Age at disease onset, years
|
29.9 (11.9)
|
28.7 (9.3)
|
30.2 (12.5)
|
0.40
|
|
Smoking status, ever smoked
|
106 (55.8 %)
|
23 (56.1 %)
|
83 (55.7 %)
|
0.96
|
|
HLA B27-positive
|
157 (82.2 %)
|
35 (83.3 %)
|
122 (81.9 %)
|
0.83
|
|
Radiographic sacroiliitis
|
134 (70.2 %)
|
27 (67.5 %)
|
107 (70.9 %)
|
0.68
|
|
Magnetic resonance imaging evidence of inflammatory lesions of the sacroiliac joints
|
88 (58.3 %)
|
20 (54.1 %)
|
68 (59.7 %)
|
0.55
|
|
Raised C-reactive protein*
|
39 (22.3 %)
|
8 (20.0 %)
|
31 (23.0 %)
|
0.69
|
|
Past history of, or current arthritis
|
72 (36.7 %)
|
12 (28.6 %)
|
60(39 %)
|
0.22
|
|
Past history of, or current enthesitis
|
85 (43.4 %)
|
25 (59.5 %)
|
60 (39 %)
|
0.01
|
|
Bath Ankylosing Spondylitis Disease Activity Index total (0–10)
|
3.0 (2.2)
|
4.7 (2.3)
|
2.6 (1.9)
|
<0.01
|
|
Global visual analog scale (0–10)
|
3.6 (2.8)
|
5.9 (2.4)
|
3.0 (2.5)
|
<0.01
|
|
Bath Ankylosing Spondylitis Functional Index (range 0–10)
|
2.6 (2.7)
|
4.8 (2.7)
|
2.0 (2.3)
|
<0.01
|
|
History of depression
|
42 (23.2 %)
|
16 (41.0 %)
|
26 (18.3 %)
|
<0.01
|
|
Past or current intake of psychotropic medications** or strong opioids
|
82 (41.8 %)
|
28 (66.7 %)
|
54 (35.1 %)
|
<0.01
|
|
Past or current intake of psychotropic medications or strong opioids or history of depression
|
82 (41.8 %)
|
28 (66.7 %)
|
54 (35.1 %)
|
<0.01
|
|
Non-steroidal anti-inflammatory drug intake, ever
|
193 (99.0 %)
|
42 (100.0 %)
|
151 (98.7 %)
|
1.00
|
|
Synthetic disease-modifying antirheumatic drug use, ever
|
104 (53.1 %)
|
23 (54.8 %)
|
81 (52.6 %)
|
0.80
|
