Table 1.
Baseline characteristics of small anterior circulation aneurysms in patients less than 40 years of age.
| Study Group (20–40 Years) |
Control Group (41–60 Years) |
p | ||||
|---|---|---|---|---|---|---|
| Cases | 67 | 172 | ||||
| Age | mean ± SD (median) | 35.3 ± 4.6 | (36) | 51.7 ± 5.4 | (52) | |
| Sex | Male–Female | 1:1.1 | 1:1.9 | 0.054 | ||
| Presentation | Hunt–Hess | |||||
| 0 | 23 | (34.3) | 80 | (46.5) | 0.170 | |
| 1~3 | 35 | (52.2) | 78 | (45.4) | ||
| 4~5 | 9 | (13.4) | 14 | (8.1) | ||
| Aneurysm | ||||||
| Size | mean ± SD (range) | 4.9 ± 1.7 | (2.5~9.8) | 5.3 ± 1.8 | (1.8~10.0) | |
| Location | n (%) | |||||
| ACA and ACoA | 29 | (43.3) | 62 | (36.0) | 0.509 | |
| MCA | 6 | (8.9) | 24 | (14.0) | ||
| ICA except paraclinoid | 21 | (31.3) | 63 | (36.6) | ||
| Paraclinoid ICA | 11 | (16.4) | 23 | (13.4) | ||
ACA: anterior cerebral artery; ACoA: anterior communicating artery; MCA: middle cerebral artery; ICA: internal carotid artery; n: number of patients.