Procedural complexity comparison between the two groups
| In situ thrombosis | Control | P values | |
| Cervical carotid tortuosity (of anterior circulation cases) | 38.2% (n=13) | 32.4% (n=211) | 0.4765 |
| Cavernous internal carotid artery grade (of anterior circulation cases) | |||
| I | 50% (n=17) | 50% (n=326) | 1.000 |
| II | 29.4% (n=10) | 18.7% (n=122) | 0.1228 |
| III | 11.8% (n=4) | 21.9% (n=143) | 0.1589 |
| IV | 8.82% (n=3) | 9.36% (n=61) | 0.9171 |
| Multiple Pipeline embolisation devices | 18.9% (n=7) | 13.9% (n=98) | 0.3933 |
| Adjunct coiling | 24.3% (n=9) | 8.37% (n=59) | 0.0010 |
| Fluoroscopy time (min) | 60.4±37 | 38.4±25 | <0.0001 |
| Radiation exposure (mGy) | 3476±1855 | 2160±1321 | <0.0001 |
| Verapamil infusion | 18.9% (n=7) | 12.8% (n=90) | 0.2792 |
| Balloon angioplasty | 37.8% (n=14) | 12.2% (n=86) | <0.0001 |