What does the ABCD2 score stand for?

Each letter represents a scored parameter: A = Age, B = Blood pressure, C = Clinical features, D = Duration of symptoms, and the second D = Diabetes. The total ranges from 0 to 7.

What is considered a high-risk ABCD2 score?

Scores of 6–7 are high risk (about 8% 2-day stroke risk). Scores of 4–5 are moderate risk (about 4%). Scores of 0–3 are low risk (about 1%). High-risk patients typically warrant urgent hospital admission.

Is the ABCD2 score a substitute for clinical judgment?

No. The ABCD2 score is a decision-support tool to be used alongside full clinical evaluation, imaging, and specialist judgment. It does not replace a comprehensive TIA workup.

Which clinical features score 2 points vs. 1 point?

Unilateral weakness (arm, leg, or face) scores 2 points because it carries higher stroke risk. Speech disturbance without weakness (dysphasia or dysarthria) scores 1 point. All other neurological symptoms score 0.

Does this tool store any patient data?

No. All calculations are performed entirely in your browser. No data is sent to any server and nothing is stored.

ABCD2 Score Calculator — TIA Stroke Risk & Interpretation Chart

Factor	Value	Points
Total

Summary

Enter five clinical parameters to calculate the ABCD2 score and estimate 2-day stroke risk after a TIA.

How it works

Select the patient's age: 60 or older scores 1 point, under 60 scores 0.
Enter whether blood pressure at presentation was elevated (systolic ≥ 140 mmHg or diastolic ≥ 90 mmHg).
Choose the dominant clinical feature: unilateral weakness scores 2, speech disturbance without weakness scores 1, other features score 0.
Select symptom duration: 60 minutes or longer scores 2, 10–59 minutes scores 1, under 10 minutes scores 0.
Indicate whether the patient has a history of diabetes.
The calculator sums the points and displays the total score with corresponding 2-day stroke risk estimate.

Use cases

Triage TIA patients in the emergency department for urgent vs. routine workup.
Support clinical decision-making for hospital admission after TIA.
Communicate quantified stroke risk to patients and families.
Identify high-risk patients who need immediate neurology consultation.
Document risk stratification in clinical notes.
Teach residents and students about TIA risk factors.

ABCD2 TIA Risk Score Calculator

Clinical Parameters

Result