Baseline characteristics
| Parameter | Solitary Aneurysm | Tandem Aneurysms | P Value |
|---|---|---|---|
| No. of PEDs placed | 184 | 34 | – |
| Aneurysms treated with single PED | 184 | 78 | – |
| 1 | 184 | – | – |
| 2 | – | 28 | – |
| 3 | – | 3 | – |
| 4 | – | 2 | – |
| 5 | – | 1 | – |
| Sex | |||
| Female | 166 (90.2%) | 31 (91.2%) | .86 |
| Male | 18 (9.8%) | 3 (8.8%) | |
| Median age (median) (range) (yr) | 58 (24–82) | 50.5 (19–75) | .006 |
| Smoking (No.) | 42 (22.8%) | 18 (52.9%) | <.001 |
| Pretreatment mRS (No.) | |||
| 0–2 | 180 (97.8%) | 32 (94.1%) | .23 |
| 3–5 | 4 (2.2%) | 2 (5.9%) | |
| Aneurysm location | |||
| Cavernous | 25 (13.6%) | 7 (9%) | .53 |
| Paraophthalmic | 133 (72.3%) | 61 (78.2%) | |
| Posterior communicating | 26 (14.1%) | 10 (12.8%) | |
| Aneurysm measurements (median) (range) (mm) | |||
| Maximal diameter | 6.2 (1.6–28.3)a | 6.7 (2–40) | .48 |
| Neck size | 4 (1–14.3)b | 3.9 (1.8–8.5)c | .14 |
| Daughter sac (No.) | 46 (25.1%) | 12 (15.4%) | .08 |
| Subarachnoid hemorrhage (No.) | |||
| Acute (<2 weeks) | 4 (2.2%) | 3 (8.8%) | .11 |
| Remote (>2 weeks) | 19 (10.3%) | 2 (5.9%) | |
| Prior treatment (No.) | |||
| Endovascular | 23 (12.5%) | 2 (2.6%) | .031 |
| Surgery | 6 (3.3%) | 0 | |
| Both | 2 (1.1%) | 1 (1.3%) | |
| Clopidogrel responders (No.) | |||
| Yes | 123 (68.7%)d | 24 (75%)e | .48 |
| No | 56 (31.3%) | 8 (25%) |