Table 1:
Characteristics of ruptured and unruptured intracranial aneurysmsa
| Characteristics | Ruptured (n = 28) | Unruptured (n = 76) | P Value |
|---|---|---|---|
| Age (yr) | 58.5 ± 11.6 | 63.8 ± 9.4 | .019 |
| Women (No.) (%) | 20 (71.4) | 60 (79.0) | .439 |
| Aneurysm location (No.) (%) | .087 | ||
| Anterior cerebral arteries | 6 (21.4) | 12 (15.8) | |
| Posterior communicating artery | 7 (25.0) | 9 (11.8) | |
| Internal carotid artery other than posterior communicating artery | 3 (10.7) | 12 (15.8) | |
| Middle cerebral artery | 9 (32.1) | 41 (54.0) | |
| Posterior circulation | 3 (10.7) | 2 (2.6) | |
| Aneurysm size (mm) | 5.4 ± 2.2 | 5.4 ± 2.1 | .932 |
| MR imaging quantitative measures | |||
| Wall enhancement index | 1.70 ± 1.06 | 0.89 ± 0.88 | .0001 |
| Stalk enhancement index | 1.61 ± 0.42 | 1.71 ± 0.36 | .214 |
| Contrast ratio against the stalk | 0.88 ± 0.40 | 0.45 ± 0.23 | <.0001 |
a
The data of continuous variables are mean ± SD.