The ASPIRE approach for TIA risk stratification.

Area of Science:

• Neurology
• Public Health

Background:

• Transient ischemic attack (TIA) significantly elevates short-term stroke risk.
• Predictive models are crucial for managing TIA patients and preventing subsequent strokes.
• Alberta implemented the ASPIRE approach for urgent TIA patient access based on risk stratification.

Purpose of the Study:

• To evaluate the effectiveness of the ASPIRE approach in identifying patients at high risk of stroke post-TIA.
• To assess the ASPIRE approach's accuracy in predicting 90-day stroke risk.

Main Methods:

• Retrospective chart review of 573 consecutive TIA patients from 2002-2005.
• Analysis of clinical and event details to determine 90-day stroke risk.
• Application of the ASPIRE criteria (ABCD2 score ≥ 4, prolonged motor/speech symptoms, or atrial fibrillation) for risk classification.

Main Results:

• The overall 90-day stroke risk was 4.7%.
• ASPIRE identified 78% of patients as high risk, with a 6.3% stroke risk in this group.
• Patients classified as low risk by ASPIRE had zero strokes (100% negative predictive value).

Conclusions:

• The ASPIRE approach demonstrates perfect negative predictive value for stroke post-TIA.
• While highly sensitive, the ASPIRE approach leads to over-identification of high-risk patients.
• The high sensitivity of ASPIRE may warrant a review for optimizing patient triage and resource utilization.