The ELAPSS Score is a risk score used to estimate the risk of aneurysm growth and is composed as follows[^1].
Score
Previous subarachnoid hemorrhage | Points |
Yes | 0 |
No | 1 |
Aneurysm location | Points |
0 | |
3 | |
PCOM / posterior circulation | 5 |
Age | Points |
≤ 60 years | 0 |
61–65 years | 1 |
66–70 years | 2 |
71–75 years | 3 |
76–80 years | 4 |
81–85 years | 5 |
86–90 years | 6 |
91–95 years | 7 |
> 95 years | 8 |
Population | Points |
North America, China, Europe (except Finland) | 0 |
Japan | 1 |
Finland | 7 |
Aneurysm size in mm | Points |
1,0 - 2,9 mm | 0 |
3,0 - 4,9 mm | 4 |
5,0 - 6,9 mm | 10 |
7,0 - 9,9 mm | 13 |
≥ 10,0 | 22 |
Aneurysm shape | Points |
Regular | 0 |
Irregular | 4 |
Interpretation
The calculated score can be interpreted as follows:
ELAPSS score points | Aneurysm growth risk |
< 5 | 3 years: 5.0% |
5–9 | 3 years: 7.8% |
10–14 | 3 years: 11.7% |
15–19 | 3 years: 17.5% |
20–24 | 3 years: 25.8% |
≥ 25 | 3 years: 42.7% |
