Canadian TIA Score (7-Day Stroke Risk)
Canadian TIA Score (Perry 2014): thirteen clinical and investigation variables (range −3 to 23) stratify the 7-day risk of stroke after a TIA (low ≤ 3, medium 4–8, high ≥ 9).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- First TIA in lifetime
- No
- Symptoms ≥ 10 minutes
- No
- History of carotid stenosis
- No
- Already on antiplatelet therapy
- Yes
- History of gait disturbance
- No
- History of unilateral weakness
- No
- History of vertigo
- No
- Triage diastolic BP ≥ 110 mmHg
- Yes
- Dysarthria or aphasia
- No
- Atrial fibrillation on ECG
- Yes
The other 3 values
- Infarction on CT
- No
- Platelets ≥ 400 ×10⁹/L
- No
- Glucose ≥ 15 mmol/L
- No
Result: Canadian TIA Score 8 — medium risk (4-8, ~2.3%).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- <= 3
- Low 7-day stroke risk (<= 0.5%).
- 4-8
- Medium risk (~2.3%).
- >= 9
- High risk (~5.9%). A risk score, not an admission order.
What you enter
- First TIA in lifetime (+2)
- Symptoms ≥ 10 minutes (+2)
- History of carotid stenosis (+2)
- Already on antiplatelet therapy (+3)
- History of gait disturbance (+1)
- History of unilateral weakness (+1)
- History of vertigo (−3)
- Triage diastolic BP ≥ 110 mmHg (+3)
- Dysarthria or aphasia (+1)
- Atrial fibrillation on ECG (+2)
The other 3 fields
- Infarction on CT (+1)
- Platelets ≥ 400 ×10⁹/L (+2)
- Glucose ≥ 15 mmol/L (+3)
How this is calculated
Perry JJ, Sivilotti MLA, Sutherland J, et al. Validation of the Canadian TIA Score to identify patients at risk for stroke after transient ischemic attack. BMJ. 2021;372:n49. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.