The PHASES Score is used to determine the risk of rupture of an intracranial Aneurysms
PHASES Score
Population | Points |
North America, Europe (excluding Finland) | 0 |
Japan | 3 |
Finland | 5 |
Hypertension | Points |
No | 0 |
Yes | 1 |
Age | Points |
< 70 | 0 |
≥ 70 years | 1 |
Aneurysm size | Points |
< 7 mm | 0 |
7–9 mm | 3 |
10–19,9 mm | 6 |
≥ 20 mm | 10 |
Previous aneurysm rupture | Points |
No | 0 |
Yes | 1 |
Aneurysm location | Points |
0 | |
2 | |
4 |
Interpretation
The points calculated from this table correlate with the following risk of aneurysm rupture:
PHASES Score points | 5-year rupture risk |
≤ 2 | 0,4% |
3 | 0,7% |
4 | 0,9% |
5 | 1,3% |
6 | 1,7% |
7 | 2,4% |
8 | 3,2% |
9 | 4,3% |
10 | 5,3% |
11 | 7,2% |
≥ 12 | 17,8% |
