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Information on the patients and their level of involvement
| Sex | AP group | A group |
|---|---|---|
| Male | 10 | 8 |
| Female | 4 | 5 |
| Mean age | 36 (18-65) | 40 (20-63) |
| Number of affected vertebrae | 14 | 13 |
| L5 | 4 | 2 |
| S1 | 1 | 3 |
| L5-S1 | 9 | 8 |
| Course of disease (month) | 7.5 (5-12) | 6.8 (4-14) |
AP anteroposterior, A anterior
