Table 2

Degenerative changes according to various  cut-offs of the lesions in the no-axSpA and the axSpA groups

No-axSpA
(n=239)
axSpA
(n=409)
P values
MRI
Canal stenosis15 (2.1)7 (1.7)0.31
24 (1.7)5 (1.2)0.56
33 (1.3)4 (0.99)0.74
Extrusion148 (20.1)58 (14.3)0.07
217 (8.8)14 (3.1)0.05
35 (2.6)4 (0.99)0.41
High-intensity zone166 (34.0)106 (23.3)0.70
212 (6.2)31 (6.8)0.91
31 (0.5)6 (1.3)0.99
Modic type I129 (14.9)19 (4.2)0.01*
21 (0.5)1 (0.2)1
31 (0.2)1
Modic type II120 (10.3)11 (2.4)0.02*
23 (1.5%)1 (0.2)0.29
32 (1.0%)0.26
Protrusion137 (19.1)71 (15.6)0.42
211 (5.7)23 (5.1)0.73
33 (1.5)8 (1.8)0.76
Pfirrmann grade >2187 (44.8)191 (42.1)0.57
244 (22.7)94 (20.7)0.65
317 (8.8)34 (7.5)0.70
Schmorls node without oedema167 (34.5)171 (37.7)0.50
248 (24.7)125 (27.5)0.52
340 (20.6)91 (20.0)0.95
Schmorls node with oedema16 (3.1)12 (2.6)0.95
21 (0.5)5 (1.1)0.79
31 (0.2)1
Radiographs
Loss of disc height153 (27.3)93 (20.5)0.09
221 (10.8)31 (6.8)0.14
37 (3.6)13 (2.9)0.83
Osteophytes135 (18.0)59 (13.0)0.14
215 (7.7)22 (4.8)0.23
38 (4.1)15 (3.3)0.81
Sclerosis132 (16.5)48 (10.6)0.06
214 (7.2)16 (3.5)0.07
36 (3.1)8 (1.8)0.46
Facet joint osteoarthritis16 (3.1)11 (2.4)0.86
21 (0.5)2 (0.4)1
3
Schmorls node18 (4.1)21 (4.6)0.90
23 (1.5)8 (1.8)1
31 (0.5)4 (0.9)0.99
  • *P<0.05.

  • axSpA, axial spondyloarthritis.