TABLE 1:

Patient characteristics at admission

CharacteristicInitial Cases(n=45)Later Cases(n=49)
Patient demographics
 Female sex35 (78)41 (84)
 Male sex10 (22)8 (16)
 Age (y)*60 ± 1258 ± 15
Presenting Symptoms
 Incidental24 (53)31 (63)
 Compressive21 (47)18 (37)
Rankin score at
 1, no handicap7 (16)6 (12)
 2, minor handicap27 (60)29 (59)
 3, moderate handicap5 (11)8 (16)
 4, moderate-severe handicap4 (8)6 (12)
 5, severe handicap2 (4)0 (0)
Aneurysmal location
 Anterior circulation31 (69)38 (78)
 Posterior circulation14 (31)11 (22)
Multiple aneurysms5 (11)8 (16)
Aneurysmal size (mm)
 <53 (7)7 (14)
 5–913 (29)19 (39)
 10–2521 (46)20 (41)
 >257 (15)3 (6)
Aneurysmal neck-to-dome ratio*0.54 ± 0.170.59 ± 0.15
Anticipated procedure risk0.0004−0.0004
  • Note.—Unless otherwise specified, data are means or numbers of patients; data in parentheses are percentages.

  • * Data are the means ± the standard deviations.

  • Data the z scores.