Table 3:
Aneurysm volume and relevant packing results of 35 aneurysms treated with helical GDC 18 coils compared with 35 volume-matched controls treated with complex Trufill/Orbit coils
| GDC 18 | Trufill/Orbit | P value (t test) | |
|---|---|---|---|
| Number of aneurysms | 35 | 35 | |
| Aneurysm volume | .98 | ||
| Mean | 297 mm3 | 295 mm3 | |
| Median | 400 mm3 | 406.5 mm3 | |
| Range | 26–1450 mm3 | 27–1504 mm3 | |
| SD | 327 mm3 | 383 mm3 | |
| Largest aneurysm diameter | |||
| Mean | 10.3 mm | 9.6 mm | |
| Median | 10 mm | 10 mm | |
| Range | 4–22 mm | 4–17 mm | |
| Packing | .15 | ||
| Mean | 23.1% | 25.1% | |
| Median | 24% | 25% | |
| Range | 8%–33% | 11%–36% | |
| SD | 5.98% | 5.67% | |
| Σ Aneurysm volumes | 14 002 mm3 | 14 229 mm3 | |
| Σ Inserted coil length | 2794 cm | 4446 cm | |
| Coil length per mm3 aneurysm volume | 0.20 cm | 0.31 cm | |
| Mean coil length per aneurysm per mm3 | 0.224 cm | 0.339 cm | <.0001 |
| Total number of coils | 157 | 238 | |
| Mean number of coils per aneurysm | 4.5 | 6.8 | .0024 |