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Patient characteristics.
| Number of patients | 138 |
|---|---|
| Male/Female | 82 (59%)/56 (40%) |
| Age (years) | 56 ± 17 |
| Primary spinal pathology: | |
| - Disc herniation | 78 (57%) |
| - Spinal canal stenosis | 25 (18%) |
| - Spinal instability | 16 (12%) |
| - Intradural tumor | 9 (7%) |
| - Other | 10 (7%) |
| Length of stay in hospital (days) | 7 ± 5 |
