ABCD² Score (Stroke Risk After TIA) — free guideline decision tool
Estimate short-term stroke risk after a transient ischaemic attack with the ABCD² score.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Age ≥ 60 | No |
|---|---|
| BP ≥ 140/90 mmHg | No |
| Clinical features | Speech disturbance, no weakness (1) |
| Duration | 10–59 min (1) |
| Diabetes | No |
→ABCD²2/7
- 2-day stroke risk：Low (~1% 2-day stroke risk)
- Note：Many stroke services now admit/urgently evaluate all TIAs regardless of score.
| Age ≥ 60 | No |
|---|---|
| BP ≥ 140/90 mmHg | No |
| Clinical features | Unilateral weakness (2) |
| Duration | ≥ 60 min (2) |
| Diabetes | No |
→ABCD²4/7
- 2-day stroke risk：Moderate (~4%)
- Note：Many stroke services now admit/urgently evaluate all TIAs regardless of score.
Common questions
What is ABCD² Score (Stroke Risk After TIA)?
Estimate short-term stroke risk after a transient ischaemic attack with the ABCD² score.
How is ABCD² Score (Stroke Risk After TIA) calculated? What is the core formula?
Age ≥ 60 (1), BP ≥ 140/90 (1), clinical features (weakness 2 / speech 1), duration (≥60 min 2 / 10–59 1), diabetes (1). 0–3 low, 4–5 moderate, 6–7 high. Score Age ≥60 (1), BP ≥140/90 (1), Clinical features (unilateral weakness 2 / speech without weakness 1), Duration (≥60 min 2 / 10–59 min 1), Diabetes (1).
When is ABCD² Score (Stroke Risk After TIA) used?
Risk-stratify TIA, though current pathways favour rapid specialist review for all.
How should ABCD² Score (Stroke Risk After TIA) results be interpreted?
0–3 low, 4–5 moderate, 6–7 high short-term stroke risk historically — contemporary pathways still urge rapid specialist review for nearly all TIAs.
What are the key clinical points for ABCD² Score (Stroke Risk After TIA)?
Limited discrimination — do not use to defer assessment. Most services urgently evaluate and image all TIAs. Combine with imaging (carotid, brain) and ECG.
What are the limits and cautions when using ABCD² Score (Stroke Risk After TIA)?
Limited discrimination — do not use ABCD² alone to defer urgent evaluation or imaging. Combine with ECG, brain and vascular imaging per stroke-service protocols. Same-day specialist pathways supersede outpatient delay based on a low score. For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
Does ABCD² Score (Stroke Risk After TIA) upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is ABCD² Score (Stroke Risk After TIA) calculated in practice? Can you show a worked example?
Inputs: Age ≥ 60 No, BP ≥ 140/90 mmHg No, Clinical features Speech disturbance, no weakness (1), Duration 10–59 min (1), Diabetes No → Result: ABCD² 2 /7（2-day stroke risk: Low (~1% 2-day stroke risk), Note: Many stroke services now admit/urgently evaluate all TIAs regardless of score.） Inputs: Age ≥ 60 No, BP ≥ 140/90 mmHg No, Clinical features Unilateral weakness (2), Duration ≥ 60 min (2), Diabetes No → Result: ABCD² 4 /7（2-day stroke risk: Moderate (~4%), Note: Many stroke services now admit/urgently evaluate all TIAs regardless of score.）
Run ABCD² Score (Stroke Risk After TIA) now
Estimate short-term stroke risk after a transient ischaemic attack with the ABCD² score.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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