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| Location | Anterior (n=96) | Posterior (n=225) | Combined (n=122) |
|---|---|---|---|
| Cervical only (%) | 25.3 | 12.1 | 6.6 |
| Cervical-thoracic (%) | 5.3 | 4.5 | 8.2 |
| Thoracic only (%) | 1.1 | 8.9 | 0.0 |
| Thoracic-lumbar (%) | 11.6 | 20.2 | 14.8 |
| Thoracic-sacrum (%) | 6.3 | 8.5 | 11.5 |
| Lumbar only (%) | 44.2 | 35.9 | 44.3 |
| Lumbar-sacrum (%) | 6.3 | 9.4 | 14.8 |
