ABCD2 Score (TIA stroke risk)
ABCD2 score for stroke risk after TIA (Johnston 2007): age >= 60 (1), BP >= 140/90 (1), clinical features (unilateral weakness 2, speech disturbance without weakness 1), duration (>= 60 min 2, 10-59 min 1), diabetes (1).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- 70 years
- Systolic BP
- 150 mmHg
- Diastolic BP
- 90 mmHg
- Clinical features
- Unilateral weakness (+2)
- Symptom duration
- 90 minutes
- Diabetes
- Yes
Result: ABCD2 7/7 - High risk (2-day stroke risk ~8.1%).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0-3
- Low risk; 2-day stroke risk 1.0% per source.
- 4-5
- Moderate risk; 2-day stroke risk 4.1% per source.
- 6-7
- High risk; 2-day stroke risk 8.1% per source.
What you enter
- Age
- Systolic BP
- Diastolic BP
- Clinical features (weakness 2 / speech 1 / other 0)
- Symptom duration
- Diabetes (1)
What this is
Compute the ABCD2 score for early stroke risk after transient ischemic attack (Johnston Lancet 2007): Age >=60, Blood pressure >=140/90, Clinical features (unilateral weakness, speech disturbance), Duration (>=60 min, 10-59 min, <10 min), and Diabetes. Sophie Well returns the 0-7 total and the published 2-day, 7-day, and 90-day stroke-risk bands.
When to use it
Use this at first contact for a patient with a probable TIA to inform urgency of workup and admission. ABCD2 is a triage aid, not a substitute for imaging - current AHA/ASA guidance recommends rapid carotid imaging, ECG, and brain MRI for most TIA patients regardless of score; the score helps prioritize how quickly that workup happens.
How this is calculated
Johnston SC, Rothwell PM, Nguyen-Huynh MN, et al. Validation and refinement of scores to predict very early stroke risk after transient ischaemic attack. Lancet 2007;369(9558):283-292. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.
More in Triage and acuity.