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Patient Characteristics
| n = 74 | % | |
| Female/male | 46/28 | 62/38 |
| Age in years | ||
| Median (IQR) | 45 (36–53) | |
| Range | 24–77 | |
| Duration of symptoms in months | ||
| Median (IQR) | 5 (2–14) | |
| Range | 0.5–157 | |
| Specific treatment before index surgery | ||
| None | 32 | 43 |
| Epidural blood patch | 39 | 53 |
| Unsuccessful surgery (externally) | 2 | 3 |
| Embolization of CSF-venous fistula | 1 | 1 |
| Bern SIH-Score | ||
| Median (IQR) | 5 (2–8) | |
| Type of spinal CSF leak | ||
| Ventral leak | 55 | 74 |
| Lateral leak | 16 | 22 |
| CSF-Venous fistula | 3 | 4 |
