The ABCD2 score is a rule used to determine the risk for stroke in the days following a transient ischemic attack.
A high score correctly predicted 87% of the people who did have a stroke in the following 7 days but also many people who did not have problems.
The ABCD2 score is based on five parameters: age, blood pressure, clinical features, duration of TIA, and presence of diabetes.
Scores for each item are added together to produce an overall result ranging between zero and seven.
Other clinical risk factors, such as atrial fibrillation and anticoagulation treatment, as well as ongoing or recurrent TIA, are also relevant risk factors.
Testing of the ABCD2 score in an acute setting, revealed it performed poorly in both high-risk and low-risk patients: 31.6% sensitive in high-risk patients (score >5) and only 12.5% specific in low-risk patients (score ≤2).
no point <60 years, normal or no speech disturbance and no unilateral weakness, <10 minutes,
1 point ≥60 years raised BP
(≥140/90 mmHg), speech disturbance present but no unilateral weakness, duration 10–59 minutes, diabetes present
2 points-unilateral weakness, age> 60,duration ≥60 minutes.
The risk for stroke can be estimated from the ABCD2 score as follows:
Score 1-3 (low)
2 day risk = 1.0%
7 day risk = 1.2%
Score 4-5 (moderate)
2 day risk = 4.1%
7 day risk = 5.9%
Score 6–7 (high)
2 day risk = 8.1%
7 day risk = 11.7%