Table 1.
Characteristics of unruptured intracranial aneurysms with and without wall enhancement.
| Variable | AWE (n = 15) | Non-AWE (n = 49) | t/χ2 | p Value |
|---|---|---|---|---|
| Age: M (SD) | 64.80 (6.03) | 58.22 (13.73) | −2.63 a | 0.011 |
| Sex: f/m | 15/0 | 40/9 | 1.87 b | 0.172 |
| Family history of IA: yes/no | 2/13 | 11/38 | 0.16 b | 0.688 |
| Prior SAH from another aneurysm: yes/no | 4/11 | 2/47 | 4.49 b | 0.034 |
| Smoking status: | ||||
| Current smoker: yes/no | 6/9 | 10/39 | 1.42 b | 0.233 |
| Previous smoker: yes/no | 7/8 | 17/32 | 0.28 b | 0.594 |
| Never smoked: yes/no | 2/13 | 22/27 | 3.63 b | 0.057 |
| Hypertension: yes/no | 10/5 | 24/25 | 0.82 b | 0.365 |
| Diabetes mellitus: yes/no | 1/14 | 8/41 | 0.27 b | 0.605 |
| Daily aspirin intake: yes/no | 2/13 | 12/37 | 0.31 b | 0.577 |
| PHASES: M (SD) | 5.13 (1.73) | 2.61 (1.88) | −4.63 a | 0.000 |
| PHASES: ≤ 2/3–4/5–6/≥ 7 | 0 */7/6 */2 | 20 */23/5 */1 | 15.18 c | 0.002 |
| Size: M (SD) | 5.79 (1.83) | 4.24 (1.36) | −3.55 a | 0.001 |
| Size: ≤ 3 mm/3–7 mm/≥ 7 mm | 1 */10/4 * | 17 */31/1 * | 12.14 c | 0.002 |
| Dome-to-neck ratio: M (SD) | 2.25 (0.83) | 1.72 (0.76) | −2.31 a | 0.024 |
| Dome-to-neck ratio: ≤ 2/> 2 | 6/9 | 39/10 | 6.83 b | 0.009 |
| Irregularity: yes/no | 8/7 | 6/43 | 9.07 b | 0.003 |
| Location: anterior/posterior circulation | 11/4 | 43/6 | 0.88 b | 0.347 |
| Multiple aneurysms: yes/no | 11/4 | 24/25 | 1.85 b | 0.173 |
a Student’s t test. b chi squared test with Yates continuity correction. c chi squared test without Yates continuity correction * Differences in proportion after Bonferroni correction. IA = intracranial aneurysm; SAH = subarachnoid haemorrhage; AWE = aneurysm wall enhancement.