ABCD3-I Score (Early Stroke Risk After TIA)
ABCD3-I score (Merwick 2010): age, blood pressure, clinical features, TIA duration, diabetes, dual TIA, carotid stenosis, and DWI abnormality give a 0–13 early-stroke risk after TIA.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 65 years
- Systolic BP
- 150 mmHg
- Diastolic BP
- 92 mmHg
- Clinical features
- Unilateral weakness (+2)
- TIA duration
- 90 minutes
- Diabetes
- Yes
- Dual TIA
- Yes
- Ipsilateral carotid stenosis ≥ 50%
- Yes
- Abnormal DWI
- Yes
Result: ABCD3-I 13/13 — high-risk (8–13) for early stroke after TIA.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Strata
- Low 0–3, medium 4–7, high 8–13; early-stroke risk rises with the total. The imaging-augmented refinement of ABCD²; a triage aid, not an imaging or anticoagulation order.
What you enter
- Age
- Systolic BP
- Diastolic BP
- Clinical features
- TIA duration
- Diabetes (+1)
- Dual TIA (prior TIA within 7 days, +2)
- Ipsilateral carotid stenosis ≥ 50% (+2)
- Abnormal DWI (acute infarct, +2)
How this is calculated
- Items
- ABCD² items (age ≥ 60 +1, BP ≥ 140/90 +1, clinical +1/+2, duration +1/+2, diabetes +1) plus dual TIA within 7 days +2, ipsilateral ≥ 50% carotid stenosis +2, and abnormal DWI +2. Total 0–13.
Merwick Á, Albers GW, Amarenco P, et al. Addition of brain and carotid imaging to the ABCD² score to identify patients at early risk of stroke after transient ischaemic attack: a multicentre observational study. Lancet Neurol. 2010;9(11):1060-1069. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.