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ABCD² Score — TIA Stroke Risk
Estimates 2-day and 7-day stroke risk following transient ischaemic attack
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ABCD² Score / 7
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2-Day Stroke Risk
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7-Day Stroke Risk
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BP Score
ABCD² Risk Stratification
| Score | Risk | 2-Day Stroke | 7-Day Stroke | Action |
|---|---|---|---|---|
| 0–3 | Low | 1.0% | 1.2% | Urgent outpatient evaluation |
| 4–5 | Moderate | 4.1% | 5.9% | Consider hospitalisation |
| 6–7 | High | 8.1% | 11.7% | Hospitalise; urgent workup |
A: Age ≥60 = 1 | B: SBP ≥140 or DBP ≥90 = 1 | C: Features (see above) | D: Duration | D2: Diabetes
Total = A + B + C + D + D2 (range 0–7)
Total = A + B + C + D + D2 (range 0–7)
Key Point: All TIA patients warrant urgent evaluation regardless of ABCD² score. High-risk patients (score ≥4) should be hospitalised. Score validates only initial TIA risk — does not apply to recurrent events or minor stroke.
For clinical decision support only. Not a substitute for professional medical judgment.
