Neurology · Emergency Medicine

Canadian TIA Score calculator

Enter the published formula inputs below to calculate and interpret this score.

Clinical inputs

First-ever TIA (lifetime)

Symptom duration ≥10 minutes

History of carotid stenosis

Already on antiplatelet therapy

History of gait disturbance

History of unilateral weakness

History of vertigo

Initial triage diastolic BP ≥110 mmHg

Dysarthria or aphasia (history or exam)

Atrial fibrillation on ECG

Infarction (new or old) on CT

Platelet count ≥400×10⁹/L

Glucose ≥15 mmol/L

Result

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Professional use only

For qualified clinicians. Independently verify inputs, calculations, source guidance, and applicability before any clinical action. This calculator does not replace clinical judgment.

Source: Perry JJ, Sharma M, Sivilotti ML, Sutherland J, Worster A, Émond M et al. A prospective cohort study of patients with transient ischemic attack to identify high-risk clinical characteristics. Stroke. 2014;45(1):92-100. DOI: 10.1161/STROKEAHA.113.003085. PMID: 24262323. Validated in: Perry JJ et al. Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack. BMJ. 2021;372:n49. PMID: 33602669. Scope: 13-variable score (range -3 to 23) estimating 7-day stroke risk after TIA; -3 to 3 low, 4-8 medium, ≥9 high risk. (2014)

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Clinical inputs

First-ever TIA (lifetime)
Symptom duration ≥10 minutes
History of carotid stenosis
Already on antiplatelet therapy
History of gait disturbance
History of unilateral weakness
History of vertigo
Initial triage diastolic BP ≥110 mmHg
Dysarthria or aphasia (history or exam)
Atrial fibrillation on ECG
Infarction (new or old) on CT
Platelet count ≥400×10⁹/L
Glucose ≥15 mmol/L

Primary source

Perry JJ, Sharma M, Sivilotti ML, Sutherland J, Worster A, Émond M et al. A prospective cohort study of patients with transient ischemic attack to identify high-risk clinical characteristics. Stroke. 2014;45(1):92-100. DOI: 10.1161/STROKEAHA.113.003085. PMID: 24262323. Validated in: Perry JJ et al. Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack. BMJ. 2021;372:n49. PMID: 33602669. Scope: 13-variable score (range -3 to 23) estimating 7-day stroke risk after TIA; -3 to 3 low, 4-8 medium, ≥9 high risk. (2014)

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