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Table 1: Cohort demographics and clinical characteristics (N = 53)
Variables No. (%)
Age at onset of symptoms (yr) 
 Mean (SD) 35.5 (10.8)
 Range 12–76
Sex 
 Male 16 (30.2)
 Female 37 (69.8)
Symptom duration (mo) 
 Mean (SD) 35.8 (49.7)
 Range 0–205
CSF leak type 
 Axilla of nerve root sleeve 36 (67.9)
 Pedicle 4 (7.6)
 Shoulder of nerve root sleeve 13 (24.5)
CSF leak side^{^a} 
 Left 27 (46.6)
 Right 31 (53.4)
CSF leak level^{^a} 
 Cervical 3 (5.7)
 Thoracic 4–6 4 (7.8)
 Thoracic 7–9 13 (24.5)
 Thoracic 10–12 31 (58.5)
 Lumbar 2 (3.8)
↵a From a total of 58 CSF leak sites.

Variables	No. (%)
Age at onset of symptoms (yr)
Mean (SD)	35.5 (10.8)
Range	12–76
Sex
Male	16 (30.2)
Female	37 (69.8)
Symptom duration (mo)
Mean (SD)	35.8 (49.7)
Range	0–205
CSF leak type
Axilla of nerve root sleeve	36 (67.9)
Pedicle	4 (7.6)
Shoulder of nerve root sleeve	13 (24.5)
CSF leak side^{^a}
Left	27 (46.6)
Right	31 (53.4)
CSF leak level^{^a}
Cervical	3 (5.7)
Thoracic 4–6	4 (7.8)
Thoracic 7–9	13 (24.5)
Thoracic 10–12	31 (58.5)
Lumbar	2 (3.8)