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Research

Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack: multicentre prospective cohort study

BMJ 2021; 372 doi: https://doi.org/10.1136/bmj.n49 (Published 04 February 2021) Cite this as: BMJ 2021;372:n49

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Re: Prospective validation of Canadian TIA Score and comparison with ABCD2 and ABCD2i for subsequent stroke risk after transient ischaemic attack: multicentre prospective cohort study

Dear Editor

Great paper, thanks.

I'd like to ask what the basis for -3 scoring for vertigo is. I cannot find a reference to this in the article? In the absence of obvious peripheral causes I have always considered vertigo a TIA symptom. This scoring suggests otherwise.

Secondly, does the inclusion of a composite outcome that includes a clinical decision impact on the reliability of the finding? It seems intuitive that if you introduce a clinical decision into a clinical outcome, then it would. Is there a sensitivity analysis taking this into account?

Kind regards

Competing interests: No competing interests

26 March 2021
william sargent
emergency physician
albury wodonga health
Borella rd albury 2640 australia
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