View source for Canadian Transient Ischemic Attack Score

== Criteria ==
{| class="wikitable"
!Item
!Score
|-
! colspan="2" |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
|-
! colspan="2" |ED Investigations
|-
|Atrial fibrillation on ECG
| +2
|-
|Infarction (new or old) on CT
| +1
|-
|Platelet count ≥400
| +2
|-
|Glucose ≥15 mmol/L
| +3
|}

== Interpretation ==
{| class="wikitable"
|'''Canadian TIA Score'''
|'''% Risk of Stroke'''
|Risk Category
|-
|<nowiki>-3</nowiki>
|0.01%
| rowspan="7" |low risk
|-
|<nowiki>-2</nowiki>
|0.01-0.03%
|-
|<nowiki>-1</nowiki>
|0.03%
|-
|0
|0.04%
|-
|1
|0.07%
|-
|2
|0.11%
|-
|3
|0.2%
|-
|4
|0.3%
| rowspan="5" |medium risk
|-
|5
|0.5%
|-
|6
|0.8%
|-
|7
|1.2%
|-
|8
|2%
|-
|9
|3.2%
| rowspan="7" |high risk
|-
|10
|5.1%
|-
|11
|8.1%
|-
|12
|12.6%
|-
|13
|19%
|-
|14
|27.6%
|-
|≥15
|>27.6%
|}