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Table 1: 
Baseline characteristics of study cohort (n = 40 patients with 41 cDAVFs)
CharacteristicNo. of Patients
Age (mean; range)57 (30–79)
Male (%)21 (53%)
Presentation
    Tinnitus14 (35%)
    Hemorrhage13 (33%)
    Incidental/nonspecific headache syndrome10 (25%)
    Seizure2 (5%)
    Superficial siderosis1 (2%)
Cognard grade
    I5 (12%)
    IIA3 (7%)
    IIB3 (7%)
    IIA+B4 (10%)
    III15 (37%)
    IV11 (27%)
Borden grade
    I8 (15%)
    II7 (22%)
    III26 (63%)