Table 1.
Demographic and aneurysm characteristics
| Parameter | Total (n=341) |
Asymptomatic aneurysms (n=248) |
Symptomatic aneurysms (n=93) |
P Value |
|---|---|---|---|---|
| Age (years) | 58.4±10.9 | 60.4±9.5 | 53.3±12.6 | <0.001* |
| Female | 202 (59.2) | 141 (56.9) | 61 (65.6) | 0.14 |
| Hypertension | 222 (65.1) | 174 (70.2) | 48 (51.6) | 0.001* |
| Dyslipidemia | 166 (48.7) | 121 (48.8) | 45 (48.4) | 0.95 |
| Diabetes | 55 (16.1) | 40 (16.1) | 15 (16.1) | 1.00 |
| Previous SAH | 12 (3.5) | 10 (4.0) | 2 (2.2) | 0.40 |
| Current cigarette smoking | 72 (21.1) | 56 (22.6) | 16 (17.2) | 0.28 |
| Alcohol consumption# | 53 (15.5) | 43 (17.3) | 10 (10.8) | 0.14 |
| Aspirin intake | 43 (12.6) | 42 (16.9) | 1 (1.1) | 0.001* |
| Familial history of intracranial aneurysm | 23 (6.7) | 15 (6.0) | 8 (8.6) | 0.40 |
| Posterior circulation | 79 (23.2) | 50 (20.2) | 29 (31.2) | 0.03* |
| Aneurysm size(mm) | 5.4 (3.5, 8.4) | 4.9 (3.3, 7) | 7.1 (5, 12.3) | <0.001* |
| Thrombus | 34 (10.0) | 14 (5.6) | 20 (21.5) | <0.001* |
| AWE pattern | <0.001* | |||
| Pattern 0 | 188 (55.1) | 171 (69) | 17 (18.3) | |
| Pattern 1 | 48 (14.1) | 34 (13.7) | 14 (15.1) | |
| Pattern 2 | 105 (30.8) | 43 (17.3) | 62 (66.7) | |
| MR imaging quantitative measures | ||||
| WEI | 0.5 (0.2, 1.3) | 0.3 (0.1, 0.9) | 1.3 (1, 1.9) | <0.001* |
The data of continuous variables are mean ± standard deviation or median (interquartile range) as appropriate. The data of categorical variables are expressed as n (%).
#
Alcohol consumption, current alcohol consumption > 15g/ day.
*
Statistically significant.
SAH, subarachnoid hemorrhage; AWE, aneurysms wall enhancement; WEI, wall enhancement index.