Methodology: 4/5          
Usefulness: 4/5

Perry JJ, et al. BMJ. 2021 Feb 4;372:n49. doi: 10.1136/bmj.n49.

Question and methods: This multicenter prospective cohort study validates the Canadian TIA Score and compares it to the ABCD2 and ABCD2i score to identify risk of subsequent stroke and carotid revascularization after TIA.
Findings: This study was able to validate the score that risk of stroke, carotid revascularization, or both within 7 days as low, medium, or high risk in a new cohort of patients more accurately than the ABCD2 and ABCD2i score.
Limitations: The score uses 13 clinical variables and needs access to tool for calculation, however, this gives it greater predictive power than the ABCD2 and ABCD2i score.

Interpretation: The Canadian TIA Score shows increased accuracy when stratifying risk after TIA compared to ABCD2 and ABCD2i and further studies once this is implemented into patient care will help evaluate the health system applicability.

By: Dr. Emma Ferguson


  • Hans Rosenberg

    Dr. Rosenberg is an emergency physician at the Ottawa Hospital, assistant professor at the University of Ottawa, and Director of the Digital Scholarship and Knowledge Dissemination Program.

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