ABCD2 Score for TIA Calculator

ABCD² score for short-term stroke risk after a transient ischemic attack (0–7).

For educational and clinical reference. Not a substitute for medical judgment. See the medical disclaimer.

Age ≥ 60 years

BP ≥ 140/90 mmHg at first assessment

Clinical features of the TIA

Duration of symptoms

Diabetes mellitus

Score

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Interpretation

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References

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.

How to use

Select each of the five ABCD² components for your patient.
The total score (0–7) and 2-day stroke risk update instantly.
Use alongside urgent TIA work-up — do not delay imaging based on a low score.

Frequently asked questions

What is the ABCD² score?

A 7-point score that estimates short-term stroke risk after a transient ischemic attack (TIA), using Age, Blood pressure, Clinical features, Duration, and Diabetes.

What ABCD² score needs admission?

Many guidelines admit or urgently work up patients with a score ≥ 4 (or any patient with crescendo TIA, AF, or carotid stenosis regardless of score).

What is the 2-day stroke risk by band?

Score 0–3 ≈ 1.0%, 4–5 ≈ 4.1%, 6–7 ≈ 8.1% risk of stroke within 2 days of the TIA.

Is ABCD² still recommended?

It is a useful triage adjunct but should not replace urgent specialist assessment and imaging; some guidelines now favour rapid TIA-clinic pathways for all patients.

Last updated June 28, 2026