Patient characteristics stratified by clinical presentation at diagnosis
| Group 1: Asymptomatic (n = 52) | Group 2: Pain (n = 56) | Group 3: Mass Effects (n = 5) | P Value | |
|---|---|---|---|---|
| Age (yr) (mean) (SD)a | 59.3 (9.4) | 51.1 (10.6) | 54.0 (11.7) | .0002a |
| Male (No.) (%) | 38 (73.1) | 44 (78.6) | 4 (80.0) | .78b |
| Hypertension (No.) (%) | 35 (67.3) | 19 (33.9) | 2 (40.0) | .002b |
| Diabetes (No.) (%) | 1 (1.9) | 5 (8.9) | 0 (0.0) | .23b |
| Hyperlipidemia (No.) (%) | 7 (13.5) | 14 (25.0) | 2 (40.0) | .18b |
| Current smoker (No.) (%) | 24 (46.2) | 26 (46.4) | 1 (20.0) | .51b |
| Initial size of aneurysm (mean) (SD)a | 7.7 (3.3) | 7.2 (3.2) | 10.2 (3.5) | .12a |
| Aneurysm location (No.) (%) | .70b | |||
| Left VA | 18 (34.6) | 25 (44.6) | 1 (20.0) | |
| Right VA | 26 (50) | 26 (46.4) | 3 (60.0) | |
| Bilateral VA | 5 (9.6) | 5 (8.9) | 1 (20.0) | |
| BA | 2 (3.8) | 0 (0.0) | 0 (0.0) | |
| Both VA and BA | 1 (1.9) | 0 (0.0) | 0 (0.0) | |
| Radiologic changes | <.001b | |||
| Improved (No.) (%) | 1 (1.9) | 15 (26.8) | 1 (20.0) | <.001c |
| Unchanged (No.) (%) | 50 (96.2) | 38 (67.9) | 3 (60.0) | <.001d |
| Enlarged (No.) (%) | 1 (1.9) | 3 (5.4) | 1 (20.0) | .15e |
| Clinical course | .048f | |||
| Stable (No.) (%) | 51 (98.1) | 55 (98.2) | 4 (80.0) | |
| Deteriorated (No.) (%) | 1 (1.9) | 1 (1.8) | 1 (20.0) |
Note:—VA indicates vertebral artery; BA, basilar artery.
↵a P value was calculated by analysis of variance.
↵b P value was calculated by the χ2 test.
↵c P value was calculated by the χ2 test between improved or not improved.
↵d P value was calculated by the χ2 test between unchanged or changed, either improved or enlarged.
↵e P value was calculated by the χ2 test between enlarged or not enlarged.
↵f P value was calculated by the χ2 test between clinically stable or deteriorated.