Number (%) of subjects with moderate/severe bone marrow oedema lesions in the sacroiliac joint (SIJ; scoreā©¾2) and/or lesions in the lumbar spine (>0) according to whether they had inflammatory back pain, mechanical back pain, or no pain symptoms
| Inflammatory | Mechanical | Healthy | |
| No lesions | 24 (47) | 9 (82) | 10 (91) |
| SIJ only | 12 (23) | 0 (0) | 0 (0) |
| Spine only | 7 (14) | 2 (18) | 1 (9) |
| SIJ and spine | 8 (16) | 0 (0) | 0 (0) |