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Table 1: 
Patient and aneurysm characteristics for the randomized groups
CharacteristicsRandomization
ASMO (n = 139)FD (n = 139)
Age (mean) (SD)57 (12)58 (12)
Female (No.) (%)108 (77.7%)110 (79.1%)
Presentation (No.) (%)  
 Asymptomatic72 (51.8%)78 (56.1%)
 Mass effect41 (29.5%)40 (28.8%)
 SAH26 (18.7%)21 (15.1%)
Aneurysm size (mm)  
 Mean (SD)13 (9)13 (10)
 Median (range)10 (2–51)10 (1–56)
  0–9 (No.) (%)66 (47.5%)68 (48.9%)
  10–25 (No.) (%)59 (42.4%)54 (38.8%)
  >25 (No.) (%)14 (10.1%)17 (12.2%)
Aneurysm neck (mm)  
 Mean (SD)5 (3)5 (3)
 Median (min–max)5 (2–15)5 (1–16)
 Undefined (No.) (%)22 (15.8%)21 (15.1%)
Location (No.) (%)  
 Anterior circulation108 (77.7%)109 (78.4%)
  Proximal carotid71 (51.1%)74 (53.2%)
   Extradural14 (10.1%)21 (15.1%)
   Ophthalmic57 (41.0%)53 (38.1%)
  Other carotid20 (14.4%)12 (8.6%)
  Other anterior17 (12.2%)23 (16.5%)
 Posterior circulation31 (22.3%)30 (21.6%)
  • Note:—min indicates minimum; max. maximum.