Table 2.
Baseline characteristics.
| Variable | Overall* Patients = 80 UIAs = 102 |
Enhancing UIAs† (n = 64) | Non-enhancing UIAs (n = 38) |
|---|---|---|---|
| Age (in years, mean ± SD) | 64.5 ± 12.2 | 66.6 ± 11.9 | 59.9 ± 10.3 |
| Women (%) | 64 (80) | 50 (78.1) | 32 (84.2) |
| Current smoking (%) | 42 (52.5) | 33 (51.6) | 22 (57.9) |
| Hypertension (%) | 45 (56.3) | 36 (56.3) | 23 (60.5) |
| Diabetes (%) | 12 (15) | 10 (15.6) | 4 (10.5) |
| Hyperlipidemia (%) | 34 (42.5) | 25 (39.1) | 16 (42.1) |
| Family history of IAs (%) | 7 (8.75) | 5 (7.8) | 5 (13.2) |
| Size (in mm, mean, range) | 8.7 (3–31) | 10.8 (3–31) | 5.1 (3–11) |
| - ≥7 mm (%) | 54 (52.9) | 44 (68.8) | 10 (26.3) |
| - <7 mm (%) | 48 (47.1) | 20 (31.3) | 28 (73.7) |
| Location | |||
| - Internal carotid artery (%) | 25 (24.5) | 22 (34.4) | 3 (7.9) |
| - Anterior communicating artery (%) | 16 (15.7) | 7 (10.9) | 9 (23.7) |
| - Anterior cerebral artery (%) | 5 (4.9) | 3 (4.7) | 2 (5.3) |
| - Middle cerebral artery (%) | 27 (26.5) | 14 (26.5) | 13 (34.2) |
| - Posterior communicating artery (%) | 5 (4.9) | 3 (4.7) | 2 (5.3) |
| - Basilar artery (%) | 19 (18.6) | 12 (18.8) | 7 (18.4) |
| - Superior cerebellar (%) | 3 (2.9) | 1 (1.6) | 2 (5.3) |
| - Vertebral artery (%) | 2 (2.0) | 2 (3.1) | 0 (0) |
CRstalk: aneurysm-to-pituitary stalk ratio; mm: millimeters; UIAs: unruptured intracranial aneurysms; SD: standard deviation
*
In overall counts, frequencies for demographics are calculated over total number of patients (N=80), whereas size and location are presented over total number of UIAs (N=102).
†
According to CRstalk ≥ 0.60 using maximal SI values.