The ABCD3 score is an extension of the ABCD2 score for predicting the risk of stroke in a patient with a history of transient ischemic attack (TIA). This is based on "preclinical" information.
Patient selection: transient ischemic attack (TIA)
Outcome: near-term stroke
Parameters from the ABCD2:
(1) age in years
(2) blood pressure in mm Hg
(3) clinical features
(4) duration of symptoms in minutes
(5) diabetes
Parameter
Finding
Points
age in years
< 60 years of age
0
>= 60 years of age
1
blood pressure in mm Hg
< 140/90 mm Hg
0
>= 140/90 mm Hg
1
clinical findings
normal
0
speech impairment without weakness
1
unilateral weakness
2
duration of symptoms
< 10 minutes
0
10 - 59 minutes
1
>= 60 minutes
2
diabetes mellitus
absent
0
present
1
Additional parameter:
(6) "dual" TIA (TIA prompting medical attention AND >= 1 TIA in preceding 7 days)
Parameter
Finding
Points
dual TIA
absent
0
present
2
total score =
= SUM(points for all 6 parameters)
Interpretation:
• minimum score: 0
• maximum score: 9
• The higher the score the greater the risk of stroke.
• A patient in the high risk group should undergo immediate evaluation and initiation of stroke preventive measures.
Total Score
Risk Group
Risk of Stroke in 7 Days
Risk of Stroke in 90 Days
0 to 3
low
trace
0.75%
4 or 5
moderate
0.8%
2.6%
6 to 9
high
3.4%
6.3%
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