Table 3

Complications, and clinical and angiographic results

TotalWEB-17WEB-21P value
Aneurysm occlusion (n=83) at 12 months* (n (%))(n=83)(n=49)(n=34)0.23
 Complete occlusion47 (56.7)29 (59.2)18 (52.9)
 Neck remnant29 (34.9)18 (36.7)11 (32.4)
 Aneurysm remnant7 (8.4)2 (4.1)5 (14.7)
 Adequate occlusion76 (91.6)47 (95.9)29 (85.3)0.12
 Aneurysm retreated2 (2.4)0 (0)2 (5.4)0.17
mRS†(n=87)(n=51)(n=36)0.14
mRS preoperative (n (%))
 mRS ≤285 (97.7)49 (96.1)36 (100)
 mRS >22 (2.3)2 (3.9)0 (0)
mRS at 12 months (n (%))
 mRS 077 (88.6)44 (86.3)33 (91.7)
 mRS 15 (5.7)4 (7.8)1 (2.7)
 mRS 42 (2.3)‡2 (3.9)‡0 (0)
 mRS 63 (3.4)§1 (2.0)2 (5.6)§
 Procedural related mortality2 (2.3)1 (2.0)1 (2.7)1.00
Complications (n (%))9/87 (10.3)7/51 (13.7)2/36 (5.4)0.14
 Intraprocedural ischemic complications3 (3.4)3 (5.9)0 (0)0.51
 Intraprocedural hemorrhagic complications3 (3.4)2 (3.9)1 (2.7)1.00
 Postprocedural complications3 (3.4)2 (3.9)1 (2.7)0.26
Complication severity (n (%))
 Death2 (2.3)1 (1.9)1 (2.7)0.52
 Transient deficit7 (8.0)6 (11.8)1 (2.7)
  • *Missing data for eight patients/9 aneurysms. Categorical variables are described as number (%).

  • †mRS 0=no symptoms; mRS 1=no significant disability despite symptoms; able to carry out all usual duties and activities; mRS 4=moderately severe disability; unable to walk without assistance and unable to attend to own bodily needs without assistance; mRS 6=dead.

  • ‡These 2 patients already had an mRS score of 4 before WEB treatment.

  • §2 patients died in relation to the WEB procedure (see complications). One more patient died 3 months after the procedure from an unrelated disease.

  • mRS, modified Rankin Scale.