Canadian Transient Ischemic Attack Score

From IDWiki

Background

Criteria

Item Score
Clinical
First TIA in lifetime +2
Symptoms lasting 10 minutes or longer +2
History of carotid artery stenosis +2
Already on antiplatelet therapy +3
History of gait disturbance +1
History of unilateral weakness +1
History of vertigo -3
Initial triage DBP ≥110 mmHg +3
Dysarthria or aphasia on history of examination +1
ED Investigations
Atrial fibrillation on ECG +2
Infarction (new or old) on CT +1
Platelet count ≥400 +2
Glucose ≥15 mmol/L +3

Interpretation

Canadian TIA Score % Risk of Stroke Risk Category
-3 0.01% low risk
-2 0.01-0.03%
-1 0.03%
0 0.04%
1 0.07%
2 0.11%
3 0.2%
4 0.3% medium risk
5 0.5%
6 0.8%
7 1.2%
8 2%
9 3.2% high risk
10 5.1%
11 8.1%
12 12.6%
13 19%
14 27.6%
≥15 >27.6%