group | Male/female (number) | Mean age ( ± s, years) | Time of onset ( ± s, month) | The vertebral body is involved | The highest incidence was L3-4 (%) | |
Two vertebral bodies were involved (n) | Three vertebral bodies were involved (n) | |||||
Group A (n = 19) | 10/9 | 42.1 ± 2.3 | 11.1 ± 2.2 | 17 | 2 | 42.10 |
Group B (n = 20) | 11/9 | 43.0 ± 1.8 | 12.0 ± 1.2 | 17 | 3 | 45.00 |