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Clinical outcomes.
| Clinical outcome | n | % | |
|---|---|---|---|
| Surgical outcome | |||
| Postop hematomas | 9/259 | 3.5 | |
| Postop infections | 2/259 | 0.8 | |
| 30-day mortality | 10/212 | 4.7 | |
| Neurological outcome at final visit | |||
| Improved-unchanged | 122 | 70.1 | |
| Worsened | 52 | 29.9 | |
| Retreatment rate | |||
| 1-year | 34 | 16.0 | |
| 2-year | 49 | 23.1 | |
| 3-year | 57 | 26.9 | |
| 5-year | 71 | 33.5 | |
| 10-year | 80 | 37.7 | |
| 15-year | 81 | 38.2 | |
