Demographics and characteristics of 41 patients with confirmed diagnosis of AO
| Demographics and Characteristics | |
|---|---|
| Total patients | 41 |
| Age (yr) | 63 (SD, 18.8); range, 16–92 |
| Etiology | |
| Postsurgical | 32 |
| Idiopathic | 7 |
| Inflammatory | 1 |
| Posttraumatic | 1 |
| Sex | |
| Male | 18 |
| Female | 23 |
| Location | |
| Lumbar spine | 36 |
| Thoracic spine | 5 |
| Follow-up duration | 3.9 (SD 3.7) years; range, 8 months to 14 years |
| No follow-up | 18 patients |
| Patients with MR imaging correlation | 25 |