Table 2

Summary of main features of hypocycloidal tomography in ankylosing spondylitis patients and controls

Ankylosing spondylitis Controls Interobserver reliability
Right n=65 Left n=63 Right n=22 Left n=22 Left Right
Condyle position
  Centred
  Anterior
  Posterior		41  (63%)
16  (25%)
8  (12%)		41  (66%)
16  (26%)
6  (8%) 		2-15020  (91%)
2-1501  (4.5%)
2-1501  (4.5%)		 2-15018  (82%)
2-1502  (9%)
2-1502  (9%)		 
0.71		 
84
 
Superior joint space
  Norma
  Widened
  Decreased		34  (52%)
31  (48%)
0		28  (44%)
32  (51%)
3  (5%) 		15  (68%)
 6  (27%)
1  (5%)		 2-15017  (77%)
2-1505  (23%)
0		 
0.62		 
0.48
 
Range of movement
  Normal
  Hypermobile
  Hypomobile
16  (25%)
33  (50%)
16  (25%)		19  (30%)
26  (41%)
18  (29%)		 †19  (86%)
†2  (9%)
†1  (4%)		 †16  (73%)
†3  (14%)
†3  (14%)		 
0.89		 
0.94
 
Osseous changes
- Condyle
  Flattening
  Sclerosis
  Osteophytes
  Erosions		14  (21.5%)
16  (25%)
2  (3%)
6  (9%)		14  (22%)
13  (21%)
5  (8%)
7  (11%)		 †0
†0
0
†0		 2-1501  (4.5%)
2-1501  (4.5%)
 1  (4.5%)
2-1501  (4.5%)		 
 
0.86
0.71
1.0
 1.0		 
 
0.86
0.61
0.65
0.78
 
Osseous changes
- Temporal
  Flattening
  Sclerosis
  Erosions		21  (32%)
25  (38%)
1  (1.5%)		19  (30%)
19  (30%)
2  (3%)		 †0
†2  (9%)
0		 †1  (4.5%)
†1  (4.5%)
 1  (4.5%)
 
 
0.84
0.83		 
 
0.83
0.79

  • ↵2-150 P < 0.05, †P < 0.01v controls