Table 1:
Aneurysm volume and relevant packing results of 32 aneurysms treated with GDC 18 coils compared with 32 volume-matched controls treated with GDC 10 coils
| GDC 18 | GDC 10 | P value (t test) | |
|---|---|---|---|
| Number of aneurysms | 32 | 32 | |
| Aneurysm volume | .96 | ||
| Mean | 329 mm3 | 333 mm3 | |
| Median | 297.5 mm3 | 309 mm3 | |
| Range | 34–1333 mm3 | 35–1377 mm3 | |
| SD | 230 mm3 | 237 mm3 | |
| Largest aneurysm diameter | |||
| Mean | 10.2 mm | 9.9 mm | |
| Median | 10 mm | 9.5 mm | |
| Range | 4–20 mm | 4–20 mm | |
| Packing | |||
| Mean | 24.2% | 18.3% | <.0001 |
| Median | 24.5% | 19.0% | |
| Range | 11%–32% | 9–33% | |
| SD | 4.97% | 4.76% | |
| Σ Aneurysm volumes | 10 542 mm3 | 10 643 mm3 | |
| Σ Inserted coil length | 2436 cm | 3419 cm | |
| Coil length per mm3 aneurysm volume | 0.23 cm | 0.32 cm | |
| Mean coil length per aneurysm per mm3 | 0.233 cm | 0.345 cm | <.0001 |
| Total number of coils | 145 | 223 | |
| Mean number of coils per aneurysm | 4.5 | 7.0 | .005 |