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. 2018 Apr 23;77(7):555–566. doi: 10.1093/jnen/nly031

TABLE 2.

Intracranial Aneurysm Characteristics Before Surgery

Ruptured IAs Unruptured IAs p value
Intracranial aneurysm n = 17 n = 31
Location: n (%) MCA: 11 (65) MCA: 24 (77.5) 0.75
ACA: 4 (23) ACA: 6 (19.5)
ICA: 1 (6) ICA: 1 (3)
Unknown: 1 (6)
Rough appearance: n (%) 4 (22) 14 (45) 0.33
Presence of blebs or lobules: n (%) 9 (53) 18 (58) 0.75
Neck size, mm: median (IQR) 3.8 (2.4–4.4) 3.6 (3.0–5.0) 0.54
Maximal diameter, mm: median (IQR) 7.5 (6.2–10.5) 6.2 (4.5–9.3) 0.27
Time from rupture to resection: n <2 days: 10 NA
>2 days: 6
Unknown: 1

Comparisons of medians and percentages have been performed using nonparametric Mann-Whitney U test or Fisher exact test, respectively.

Rough appearance is defined as the presence of submillimetric irregularities.

IQR = interquartile range; ICA= internal carotid artery; MCA = middle cerebral artery; ACA = anterior cerebral arteries, including: anterior cerebral artery, anterior communicating artery (Acom) and pericallosal artery (A2); n, number; NA: not applicable.