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Baseline characteristics of study cohort (n = 40 patients with 41 cDAVFs)
| Characteristic | No. of Patients |
|---|---|
| Age (mean; range) | 57 (30–79) |
| Male (%) | 21 (53%) |
| Presentation | |
| Tinnitus | 14 (35%) |
| Hemorrhage | 13 (33%) |
| Incidental/nonspecific headache syndrome | 10 (25%) |
| Seizure | 2 (5%) |
| Superficial siderosis | 1 (2%) |
| Cognard grade | |
| I | 5 (12%) |
| IIA | 3 (7%) |
| IIB | 3 (7%) |
| IIA+B | 4 (10%) |
| III | 15 (37%) |
| IV | 11 (27%) |
| Borden grade | |
| I | 8 (15%) |
| II | 7 (22%) |
| III | 26 (63%) |
