Spinal radiographic signs in the groups
| Enteroarthritis (n = 53) | Uroarthritis (n = 37) | Reiter’s syndrome, aetiology unknown (n = 5) | Total (95) | |
|---|---|---|---|---|
| *Significant difference between groups (p<0.05). | ||||
| Squaring of vertebrae, presence (%) | 5 (9) | 0 (0) | 0 (0) | 5 (5) |
| Romanus lesions, presence (%) | 1 (2) | 0 (0) | 0 (0) | 1 (1) |
| Syndesmophytes, presence (%) | 3 (6)* | 9 (24)* | 1 (20) | 13 (14) |
| Non-marginal/marginal, presence | 2/1 | 7/2 | 0/1 | 9/4 |
| Syndesmophytes, mean number per patient (range) | 0.15* (0 to 3) | 0.54* (0 to 6) | 0.40 (0 to 2) | 0.32 (0 to 6) |
| Non-marginal/marginal syndesmophytes (n (%) non-marginal) | 5/3 (63) | 17/3 (85) | 1/1 (50) | 23/7 (77) |
| Anterior syndesmophytes (n (%)) | 4 (50) | 9 (45) | 0 (0) | 13 (43) |
| Unilateral syndesmophytes, number (%) | 3 (38) | 7 (35) | 1 (50) | 11 (37) |
| Bilateral asymmetric syndesmophytes (n (%)) | 0 (0) | 2 (10) | 1 (50) | 3 (10) |
| Mean number of syndesmophytes in patients with syndesmophytes (range) | 2.7 (2 to 3) | 2.2 (1 to 6) | 2 (2) | 2.3 (1 to 6) |
| Mean grade of syndesmophytes in patients with syndesmophytes (range) | 2.5 (1 to 3) | 2.3 (1 to 3) | 3.0 (3) | 2.4 (1 to 3) |
| Osteophytes, presence (%) | 22 (42) | 13 (35) | 2 (40) | 37 (39) |
| Disc space narrowing, presence (%) | 15 (28) | 13 (35) | 0 (0) | 28 (29) |