Demographic and radiological characteristics of 179 patients admitted for magnetic resonance imaging (MRI) evaluation of sacroiliac pain. Values are means (± SD).
| Diagnosis | ||||||||
|---|---|---|---|---|---|---|---|---|
| HLA-B27– SpA, n = 101 | SI Changes, n = 28 | AS, n = 27 | PsA, n = 9 | RA, n = 8 | Oligoarthritis, n = 3 | SS, n = 2 | SLE, n = 1 | |
| Demographic characteristics | ||||||||
| Age, yrs | 9.4 (12.0) | 48.3 (12.3) | 42.9 (16.7) | 48.6 (16.2) | 56.7 (8.0) | 54.6 (18.7) | 46.2 (5.6) | 47.3 |
| CRP, mg/l | 6.1 (5.4) | 8.1 (6.6) | 15.6 (7.1) | 12.3 (7.4) | 13.1 (6.4) | 11.7 (7.4) | 15.1 (10.4) | 16.8 |
| MRI Characteristics | ||||||||
| Total MRI score | 1.2 (1.5) | 0.9 (1.3) | 2.2 (1.2) | 1.8 (2.0) | 1.6 (1.9) | 1.7 (2.9) | 0 | 2 |
| JSI | ||||||||
| n | 4 | 0 | 5 | 0 | 1 | 0 | 0 | 0 |
| Score | 0.06 (0.2) | — | 0.2 (0.3) | — | 0.1 (0.3) | — | — | — |
| BME | ||||||||
| n | 29 | 6 | 16 | 4 | 2 | 1 | 0 | 0 |
| Score | 0.4 (0.7) | 0.4 (0.9) | 0.8 (0.7) | 0.8 (1.0) | 0.6 (1.3) | 0.7 (1.0) | — | — |
| Erosion | ||||||||
| n | 2 | 0 | 12 | 1 | 2 | 1 | 0 | 0 |
| Score | 0.04 (0.2) | — | 0.6 (0.6) | 0.1 (0.3) | 0.2 (0.4) | 0.3 (0.5) | — | — |
| SCC | ||||||||
| n | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
| Score | 0.1 (0.4) | — | — | 0.1 (0.3) | — | — | — | 2.0 |
| CME | ||||||||
| n | 28 | 4 | 14 | 4 | 2 | 1 | 0 | 0 |
| Score | 0.5 (0.8) | 0.4 (1.0) | 0.6 (0.7) | 0.8 (1.0) | 0.6 (1.1) | 0.7 (1.0) | — | — |
AS: ankylosing spondylitis; BME: bone marrow edema; CME: contrast medium enhancement; CRP: C-reactive protein; HLA-B27– SpA: HLA-B27– spondyloarthropathy; JSI: joint space irregularities; PsA: psoriatic arthritis; RA: rheumatoid arthritis; SCC: subcortical cysts; SS: Sjögren’s syndrome; SLE: systemic lupus erythematosus; SI: Changes: nonspecific degenerative sacroiliac changes.